Malicious PDF — malware analysis report

Static analysis result for SHA-256 772be12498a2d3cf…

MALICIOUS

PDF

68.1 KB Created: 2020-08-03 21:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7b77a30bc6423c549c786506d6aebee SHA-1: b29e5a1c17daed39aaaee0f41f7a08ae3abc544c SHA-256: 772be12498a2d3cf6cb962e05c4aafd74050b8c0b9eb32acc76fe48f7cc364c3
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. It also exhibits a PDF link farm pattern, embedding numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=cancionero+catolico+pdf', confirming the malicious redirector. The primary attack pattern involves luring users through these links, potentially as part of a phishing or SEO spam campaign.

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=cancionero+catolico+pdf
    • http://files.samdrakeracing.com/uploads/1/3/0/7/130775551/siwilovekanuju.pdf
    • http://files.mariebyrdsproul.com/uploads/1/3/0/8/130874598/6292840.pdf
    • http://files.symphonicbandcamp.org/uploads/1/3/2/7/132741476/vonesutukale.pdf
    • http://files.you-turn-drug-docket.org/uploads/1/3/0/7/130738554/2093948.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3432/8735/files/siamese_network_keras.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3170/files/sifemabumavevog.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/wosojebujanewijiromiviv.pdf
    • https://cdn.shopify.com/s/files/1/0432/5058/1662/files/58111106296.pdf
    • https://cdn.shopify.com/s/files/1/0434/3214/9148/files/budofamodananelug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9768/files/geragejipurawej.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1354/files/13088833306.pdf
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/xumagutezixekot.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/38345675049.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31052941417.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/guwapavazofoletetomudafuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/9431/9009/files/59854113821.pdf
    • https://cdn.shopify.com/s/files/1/0435/2498/0904/files/89076931621.pdf
    • https://cdn.shopify.com/s/files/1/0439/4647/5678/files/povugami.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1d2.bin
20be08ae89d82a486327da51092f8ef5527923be15b814e1802980e789196bab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D2 4780 bytes
font_01_sfnt_off0000d218.bin
2e56126fd45174d47bdbcddc5432ba3938f3ad5a3a5def8b40a8b6560c72f2bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD218 10224 bytes
font_02_sfnt_off0000f514.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF514 4324 bytes

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