Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b9bad7580bdaa77…

MALICIOUS

PDF

48.6 KB Created: 2020-08-18 19:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c13858899985aa0e7209682e124d5e8 SHA-1: 5f8d943c37be948a254e309a22d23f5b14f29733 SHA-256: 6b9bad7580bdaa77831706fc95432cdcbf6e33f4302f81ca2dd70808f70ad1ef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and appears to be a lure. The presence of numerous external PDF links suggests a link farm designed to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=happy+anniversary+my+love+images
    • http://files.msgarciaslaterk.com/uploads/1/3/0/7/130776257/5040840.pdf
    • http://files.kellyjacobsonstudios.com/uploads/1/3/1/1/131164557/654569.pdf
    • http://files.magicalhomesneardisney.com/uploads/1/3/0/8/130814855/3332160.pdf
    • http://nodujenig.counseling-csj.org/uploads/1/3/0/8/130874683/rotulokip-wajoveb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0449/4698/1023/files/jotegudilazotogami.pdf
    • https://cdn.shopify.com/s/files/1/0433/1087/4777/files/66064690541.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/xotezibisufizatexojoti.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/gegogedegij.pdf
    • https://cdn.shopify.com/s/files/1/0435/6984/0283/files/87903285019.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/fetuvazazapuge.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/girl_scout_cookies_order_form_2015.pdf
    • https://cdn.shopify.com/s/files/1/0432/9861/9557/files/33575020967.pdf
    • https://cdn.shopify.com/s/files/1/0430/6544/2457/files/24345852331.pdf
    • https://cdn.shopify.com/s/files/1/0432/1129/2827/files/malug.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8233/files/sugoguno.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008076.bin
d2a30d33ce9b83ebef565413659057d06eb7a9fe2943cd60cd9a30d1f19ab6fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8076 5260 bytes
font_01_sfnt_off0000924e.bin
f547b7f8beb65463bad4925cbd0088ec5c59be4907fd96bc4c86979092fa4fd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x924E 10328 bytes