Malicious PDF — malware analysis report

Static analysis result for SHA-256 1110a5e5644c8852…

MALICIOUS

PDF

133.7 KB Created: 2020-08-04 07:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 313981d1cd36a633df039d82003f3a6f SHA-1: 8ea3fe9f5237d8ec7b1863b97c6776334c10702e SHA-256: 1110a5e5644c8852560ec41ab73422cb8f1ad2b89cdfb06953cd065a63090b2a
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 infrastructure, specifically 'ttraff.ru', which is disguised as 'analytical chemistry pdf notes'. This suggests a phishing or scam attempt. The PDF also hosts a large number of external PDF links, many of which point to Shopify, potentially as part of a link farm to improve SEO for malicious content. No scripts were extracted, but the presence of malicious links is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.ru/pify?keyword=analytical+chemistry+pdf+notes
    • http://files.happylivingg.com/uploads/1/3/1/4/131438180/xelofopipanarami.pdf
    • http://files.karmaindiatravel.com/uploads/1/3/2/8/132814906/57af2405b.pdf
    • http://files.luvafrenchbulldog.com/uploads/1/3/1/6/131636654/vijiguteminezosisil.pdf
    • http://files.zakariyakhunji.com/uploads/1/3/1/6/131606331/5729441.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.orgThis
    • https://cdn.shopify.com/s/files/1/0432/2898/7547/files/ratoxivuwivir.pdf
    • https://cdn.shopify.com/s/files/1/0429/9656/4131/files/29233034625.pdf
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/pafoxaki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77330784460.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8685957786.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/89843061502.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1369814796.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2092/files/play_letris_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/5308/8919/files/31698046557.pdf
    • https://cdn.shopify.com/s/files/1/0434/5534/8888/files/42092984280.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
    • http://scripts.sil.org/
    • http://scripts.sil.org/OFLAbyssinica
    • http://sinhala.sourceforge.net/
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITS
    • http://www.gnu.org/licenses/gpl-2.0.html

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000199a1.bin
5eb5bb4192b8e69b6a461efddbd80acfde08aeca10be5b6518a7c90c4d5c337d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x199A1 5484 bytes
font_01_sfnt_off0001ac26.bin
3d9be9937f4ee41a09003f80b6a4caa0bd95b25932226d5a521faecac4232e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC26 20992 bytes
font_02_sfnt_off0001cc60.bin
ea1226190e3d616f190c7ecbd829c3d4e1530c3f1e185fb2361718e0e63a95c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC60 2040 bytes
font_03_sfnt_off0001d4f4.bin
2c5466cbb1bbf4642982cd80e4055ca47e1c996f9246594d1ef5b83addd20f73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4F4 2684 bytes
font_04_sfnt_off0001df4f.bin
68d748bf20cd581831a94131f775bcc37dd54c3fa2fe0f00c0eb630b61cf14bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF4F 12456 bytes

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