Malicious PDF — malware analysis report

Static analysis result for SHA-256 0842339fcd303a0f…

MALICIOUS

PDF

46.4 KB Created: 2020-10-07 15:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 388e5e162243703d0a9c8e9d8ec9c923 SHA-1: bf08b8b52fbd862628e47a99e2375bef680ac4df SHA-256: 0842339fcd303a0f4ef2652a58a29b38a88efff49f3d20b6edc359c3d4e97549
154 Risk Score

Malware Insights

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

The PDF document contains numerous links to external PDF files, many of which are hosted on suspicious domains and likely serve as part of a link farm or redirect to malicious content. The primary redirector URL, 'https://ttraff.link/pify?keyword=annie+armstrong+easter+offering', is flagged as malicious. The document's content, though heavily obfuscated, appears to be a lure related to the "Annie Armstrong Easter Offering", suggesting a social engineering tactic to encourage clicks on the embedded malicious links. No scripts were extracted, but the presence of malicious redirectors and a link farm indicates a high likelihood of leading users to further malicious content.

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.link/pify?keyword=annie+armstrong+easter+offering In PDF document text
    • https://site-1043165.mozfiles.com/files/1043165/zejebogapiwikiduxu.pdfIn PDF document text
    • https://site-1042731.mozfiles.com/files/1042731/49699468619.pdfIn PDF document text
    • https://site-1043572.mozfiles.com/files/1043572/zovinuvotesajetuk.pdfIn PDF document text
    • https://site-1036969.mozfiles.com/files/1036969/xokudalekudibiwonazoribi.pdfIn PDF document text
    • https://site-1039748.mozfiles.com/files/1039748/69836724995.pdfIn PDF document text
    • https://site-1039133.mozfiles.com/files/1039133/gonaxenuxuf.pdfIn PDF document text
    • https://site-1048208.mozfiles.com/files/1048208/suvibejewamezajasat.pdfIn PDF document text
    • http://files.exclusivepet.net/uploads/1/3/0/7/130739119/8974651.pdfIn PDF document text
    • http://guwaxuj.captainpaulsdogs.com/uploads/1/3/0/7/130739431/potovi-bedud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/rasufagogarewifalasuxuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2358/0322/files/9408565337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8460/4326/files/gta_iv_unlock_code_and_serial_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4113/1162/files/what_does_e-9_mean_on_accu_chek.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6821 4832 bytes
SHA-256: 8b720db7ee218bb72564290fee4170193955ed10ea64fde0783ec1245f9c9f4c
font_01_sfnt_off0000786d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x786D 10864 bytes
SHA-256: 12b40dfc611d858249e932e7edc3a372abdb2369efe1da79601a112efb162611
font_02_sfnt_off00009d0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D0C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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