Malicious PDF — malware analysis report

Static analysis result for SHA-256 7293e85b71ef96a3…

MALICIOUS

PDF

43.7 KB Created: 2020-08-19 10:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4726b526f1e815fc7e7f146d67b4dc37 SHA-1: 9bf70c7c70c6296a6e1330f40e96a4f8e3904d26 SHA-256: 7293e85b71ef96a3c353f2fee0564f432f505f4cbef138ac50571b1eff3e830b
162 Risk Score

Malware Insights

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

The PDF contains embedded links that are identified as malicious redirectors, specifically disguised as a 'free blank contractor invoice template'. The document body and heuristics indicate a lure to a link farm, with the primary malicious URL being ttraff.com. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to redirect the user to malicious content, likely for further exploitation or phishing.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=free+blank+contractor+invoice+template
    • http://files.stpaulconsortium.com/uploads/1/3/0/9/130968988/susizawozemozuxu.pdf
    • http://files.nrwhp.com/uploads/1/3/0/8/130874458/2023a7a6404d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/36738972918.pdf
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/lee_roy_kunz_imdb.pdf
    • https://cdn.shopify.com/s/files/1/0434/1094/8254/files/defudajikisaxolisipunute.pdf
    • https://cdn.shopify.com/s/files/1/0435/2232/6696/files/mixirewuduwupalilesofofus.pdf
    • https://cdn.shopify.com/s/files/1/0438/4001/2450/files/naxox.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/buxaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0693/4688/files/wuwudikemabomakutija.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/xegelivuzurewosaja.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/teri_aankhen_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/the_giver_resolution.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/adobe_photoshop_tutorials_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0429/5160/6435/files/tatetugipanil.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_off00006dbb.bin
a0939fc93b9cc3797764fe964bdb29d590fd265c150cead935a02d5a8e7039d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBB 5120 bytes
font_01_sfnt_off00007f10.bin
d6ff1cb1ceb35e3e8aaa1d5c0a9cb7b7da802c6244787bc1187201e5686a9ed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F10 10244 bytes

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