Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a56b9b6f0277c3…

MALICIOUS

PDF

45.7 KB Created: 2020-08-30 11:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a47a0a2315b25d4372d1e517a5a40f60 SHA-1: e04af9a7624bddc6d6d508a245c6da5425dfa6b7 SHA-256: 70a56b9b6f0277c3b5ca6ed316026c7899dcda96345ed100224aa9f313a0e2c6
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is also present in the document body. It also exhibits a PDF link farm heuristic, indicating an attempt to host numerous external links, many of which point to Shopify domains. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of embedded URLs and the link farm suggest a phishing or redirection attempt.

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/wix?keyword=planet+coaster+staff+happiness
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/72462176128.pdf
    • https://cdn.shopify.com/s/files/1/0433/8152/2599/files/larson_precalculus_with_limits_online_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0437/0386/1401/files/building_management_ordinance.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2470/files/33503847282.pdf
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/baxod.pdf
    • https://cdn.shopify.com/s/files/1/0441/3331/8808/files/73923184708.pdf
    • https://cdn.shopify.com/s/files/1/0438/2290/7549/files/boxufavuwikawepix.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4024/files/formal_conference_invitation_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/5886/9910/files/mopun.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7255/files/64882141636.pdf
    • https://static.usrfiles.com/ugd/3f0e57_daa620d9c1964d0c890d03a75bb579bf.pdf
    • https://static.usrfiles.com/ugd/73c254_e541b05a27064cf6ac0960a126ea3ce8.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_adc305a767d046539f82c6d6c9214d7e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4bfd0b827d545d797ce4ef1fe9a5f79.pdf
    • https://static.usrfiles.com/ugd/63d3ad_9ec4e87b1b904d88845540fb7f49d25d.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/3063276919.pdf
    • https://cdn.shopify.com/s/files/1/0437/2113/0152/files/rufawofubikekudaperew.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_off000067b9.bin
02cb5f61333ef5928f902686055ba990e85cee4b6c6d2da828908a5a61adf7d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B9 4892 bytes
font_01_sfnt_off00007841.bin
693bb204ecf1cd9cf2b0998971ea0ba90da5895419678b239884361dcbc1de03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7841 10428 bytes
font_02_sfnt_off00009bb5.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB5 4324 bytes

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