Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da834dbc79630b3…

MALICIOUS

PDF

46.4 KB Created: 2020-09-08 02:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a270b49ccd98ae99de2f6f4db5bee6fc SHA-1: d4d91763160b8accca28dbcf96cdb03b88115cf5 SHA-256: 0da834dbc79630b3786ab879ea95f20e091f3d8973d9c8b6ff3d0ba29e4f140b
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, which points to a URL disguised as 'collisions and conservation of momentum lab answers'. This URL is the primary IOC. The document also contains a large number of embedded links, many of which are to Shopify, suggesting a link farm or SEO abuse tactic. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a phishing or scam 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.me/wix?keyword=collisions+and+conservation+of+momentum+lab+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3671/2861/files/nebagujufumusideluwipokel.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2519/files/95500195106.pdf
    • https://cdn.shopify.com/s/files/1/0438/0141/1744/files/fedex_freight_bill_of_lading.pdf
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/selebejijivenibedetusipa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7039/files/kexujovonevenogasinuno.pdf
    • https://cdn.shopify.com/s/files/1/0439/2298/1032/files/11021239383.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/globo_reporter_sobre_o_chipre.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4486/files/alienware_command_center_windows_7.pdf
    • https://static.usrfiles.com/ugd/50c35f_02b91a517c5b420eaf2cd4dc2cf75299.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9f61959076245ed9fa00c96a6d56967.pdf
    • https://static.usrfiles.com/ugd/724fb5_d50ba7627a96494b80b9e9a6022e85f0.pdf
    • https://static.usrfiles.com/ugd/0aab01_70bf0e41c0924639adc99ffb911d8576.pdf
    • https://static.usrfiles.com/ugd/c34aa9_86cbd4744f1c4a00bd5995379709908f.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_9488d0b96e25459c80dac7ac3aab7f2e.pdf
    • https://static.usrfiles.com/ugd/5af86b_3f5a26312b244caf9e2f06711f024291.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_off0000759f.bin
2566bf9591858ba0641a931f3e18c5481f014cd88c677862d5d81de89dc1a6e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x759F 5364 bytes
font_01_sfnt_off000087d9.bin
f4047e9eea048c76196b7b0dc7d8e2995f0d083da7723d790cc4e1e93ff6647e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D9 10768 bytes

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