Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e947986da3547a…

MALICIOUS

PDF

54.2 KB Created: 2020-08-23 07:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e98e817d208b928d8b68e3415ae3d178 SHA-1: b5a418a05b633d9fb8805a61c55f4cda1abd1cda SHA-256: 47e947986da3547a15ca34fbc658c9f838ace918baeedc7b318b66b166cd79a5
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the ttraff.com URL, which is a known redirector. The document body contains obfuscated text and a URL that appears to be part of the malicious infrastructure. No scripts were extracted, but the PDF structure itself is weaponized to deliver malicious links.

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=bootstrap+grid+template+code
    • http://files.mogsu.org/uploads/1/3/2/7/132740214/rofurulu.pdf
    • http://mokeju.eartharkbotswana.com/uploads/1/3/1/4/131483245/5513673.pdf
    • http://files.mlfickcourtlandkindergarten.com/uploads/1/3/0/7/130775679/8123137.pdf
    • https://cdn.shopify.com/s/files/1/0436/9471/9131/files/buzutapukak.pdf
    • https://cdn.shopify.com/s/files/1/0466/7460/8293/files/caernarvon_township_police_reports.pdf
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/wasinufonexarevelaviso.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/cry_of_balintawak_or_pugad_lawin.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6582/files/38245416987.pdf
    • https://cdn.shopify.com/s/files/1/0434/6678/4932/files/tarzan_car_full_movie_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/87418262882.pdf
    • https://cdn.shopify.com/s/files/1/0428/5913/5132/files/55555569034.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/12348736767.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8095/files/vehicle_bill_of_sale_georgia.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000877c.bin
fa32524981479324ee905d4d61cc3c865e184e643a4e3d6db1d4897753fc59ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x877C 5440 bytes
font_01_sfnt_off000099e5.bin
fafda474c4b0cefb266e463fca202015f41129755f1686b86b71de616c9c3a85
pdf-font-stream PDF embedded font (sfnt) at offset 0x99E5 16208 bytes