Malicious PDF — malware analysis report

Static analysis result for SHA-256 9adf6c984e475c5e…

MALICIOUS

PDF

54.5 KB Created: 2020-07-10 02:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 88c52b41f79db0fac8b5f58a4881757d SHA-1: a483447a71d586d043e3f67f3939da703c251884 SHA-256: 9adf6c984e475c5e33b288cf1a6e4ed6ac1d3020c0cf94b5716f4acc2acc1194
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded URLs, indicating a link farm designed to redirect users to potentially malicious content. One critical heuristic firing confirms a PDF redirector link to 'ttraff.cc', suggesting a phishing or malware distribution attempt. The document body itself is largely obfuscated but contains the same URLs, reinforcing the attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wb?keyword=manual%20platelet%20count%20dog%20formula In PDF document text
    • http://files.setonmiraclemiles.com/uploads/1/3/1/3/131380901/2390946.pdfIn PDF document text
    • http://files.oliviadibenigno.com/uploads/1/3/1/1/131163953/guwupe.pdfIn PDF document text
    • http://files.hunniebutter.com/uploads/1/3/2/7/132740525/9197563.pdfIn PDF document text
    • http://files.elovelidge.com/uploads/1/3/0/8/130814423/losopijowaxadu.pdfIn PDF document text
    • http://files.jamesmatthewwilson.com/uploads/1/3/1/6/131637057/d1e23bb.pdfIn PDF document text
    • http://files.madlyeclectic.com/uploads/1/3/1/4/131483253/nuwitoduku_xafozovininu_lekilirox_navagad.pdfIn PDF document text
    • http://files.desjun.com/uploads/1/3/1/6/131606688/pefofejigifawabaji.pdfIn PDF document text
    • http://files.kspaceonline.com/uploads/1/3/1/3/131380868/b7e90.pdfIn PDF document text
    • http://files.bouwjesite.nl/uploads/1/3/1/4/131405948/tarabo_worimurum_dezalilef_sixokurejimow.pdfIn PDF document text
    • http://files.asianlifestyletv.com/uploads/1/3/1/4/131453007/4121461.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tiruwomexeja.files.wordpress.com/2020/06/mubevexoposupubabifosa.pdfIn PDF document text
    • https://jakasizox.files.wordpress.com/2020/06/66029494542.pdfIn PDF document text
    • https://begatipid.files.wordpress.com/2020/06/nepatuxepe.pdfIn PDF document text
    • https://niwopovol.files.wordpress.com/2020/06/kejiwejasifekexamem.pdfIn PDF document text
    • https://tabafoxugo.files.wordpress.com/2020/06/32464412838.pdfIn PDF document text
    • https://mopajosotot.files.wordpress.com/2020/06/74540837903.pdfIn PDF document text
    • https://dojivoxavinu.files.wordpress.com/2020/06/feroxukesuneb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sibubemazalomasedexikeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92588710477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30812088679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F7 5136 bytes
SHA-256: 6d4bf1b78aabe99258189b90841881407fde2ab39506177ca6833d98f75a904c
font_01_sfnt_off00009358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9358 10296 bytes
SHA-256: 86a733ca1568fc3ec708c4a709bf46fc2b8daf6eef1ef02bc0d77743e4ab7063
font_02_sfnt_off0000b6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6BC 16320 bytes
SHA-256: 84d3fd258943f06f05ae19366a050048c68f2de4745d6677d383e3446f192251