Malicious PDF — malware analysis report

Static analysis result for SHA-256 000a674bc5e5307f…

MALICIOUS

PDF

38.0 KB Created: 2020-08-08 10:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e4d4ac1c945018bed2c5d3e45d8542f SHA-1: 62acd0eb76e73165122ccdcd4559bbec319049af SHA-256: 000a674bc5e5307f775d13052fce77adc0cc388cb68a972ecadcc1e9dbbf993b
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File T1059.001 PowerShell

The PDF contains a malicious redirector link to 'ttraff.com' which is part of a link farm designed to distribute PDF files. The document body also contains a deceptive call-to-action phrase, suggesting a lure to download content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=headway+beginner+5th+edition+pdf+download
    • http://files.londonpokersocial.com/uploads/1/3/1/8/131871614/pajorinu.pdf
    • http://lisaxu.intricatetaste.com/uploads/1/3/0/7/130776208/73d3b6bc3e2bb.pdf
    • http://files.photographybysonia.com/uploads/1/3/1/3/131380627/fd92d9bccaf5.pdf
    • http://files.calvarytemplepentecostal.net/uploads/1/3/1/6/131636655/5872189.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/nekotuvinoravufif.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/gilowewofuno.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/coaching_style_of_leadership.pdf
    • https://cdn.shopify.com/s/files/1/0435/9720/1567/files/13694364980.pdf
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/om_shanti_om_cast.pdf
    • https://cdn.shopify.com/s/files/1/0437/8748/5342/files/71635468258.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/bonofunodowed.pdf
    • https://cdn.shopify.com/s/files/1/0430/8054/8505/files/nofafuzusepaduluzizonun.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9383/files/rutuvowugofaxupe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7074/9849/files/catalogo_de_bujias_ngk_2020_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0440/5841/1160/files/minecraft_void_ore_miner.pdf
    • https://cdn.shopify.com/s/files/1/0432/3246/0960/files/77562478983.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/sikudelonevogipasosiriv.pdf
    • https://cdn.shopify.com/s/files/1/0430/8172/8151/files/gelejubotawavekonifigetu.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_off00005573.bin
eef4b28bf5c0541b47b2a7e623be484a76fd0353610395af304f01114f833ab3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5573 5544 bytes
font_01_sfnt_off00006861.bin
441e7e84f388d7233d2e506b158e43c0d149ab8ec5d8b33cadb0ec68ea1bf019		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6861 9932 bytes

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