Malicious PDF — malware analysis report

Static analysis result for SHA-256 3385407c975596a4…

MALICIOUS

PDF

43.7 KB Created: 2020-08-10 23:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23ccd44414a5ea85e9626ad950412d67 SHA-1: a5896ad0944c89ef4381c5947db0d36c43fc820b SHA-256: 3385407c975596a4f252b7943def50c31ed39a4595f643b84063d5a161bb43d3
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=algebraic+topology+allen+hatcher+pdf'. This indicates the document's primary purpose is to redirect users to a potentially harmful site. The presence of a large number of external PDF links, many hosted on Shopify, further suggests a link farm or SEO manipulation tactic to obscure the malicious destination. No scripts were extracted, but the PDF structure and embedded links strongly suggest a social engineering attack.

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=algebraic+topology+allen+hatcher+pdf
    • http://nidasigax.leannewaterhouse.com/uploads/1/3/1/4/131482853/e6bdcb6.pdf
    • http://gegati.cosmicrockbooklets.com/uploads/1/3/1/6/131637814/ce55f.pdf
    • http://files.detaillocksmiths.com.au/uploads/1/3/0/8/130874043/440f08.pdf
    • http://files.stewartislandnews.com/uploads/1/3/1/3/131384424/memakowogulejurid.pdf
    • http://files.quasilocum.com/uploads/1/3/1/3/131380733/dazepip-tefifipipewesex.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8744/files/26231146152.pdf
    • https://cdn.shopify.com/s/files/1/0437/5265/2951/files/21610331172.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3568/files/basic_accounting_principles_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/7358/4793/files/algebra_2_larson.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/gastrointestinal_infection_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/tumete.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85484739365.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/fipuveregejoseradofaris.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5671/files/aperturas_de_ajedrez_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0436/4910/6080/files/sql_tutorial_with_examples_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/legawizejejixaxosufe.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/
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/leg

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d56.bin
f3e85afac7cddf2fa1320309e36b6d13994f9fac71448ccf0fdf14e3614045a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D56 5468 bytes
font_01_sfnt_off00007fe3.bin
cca1c2cf5d851d79062022d611fbbe08c4402a3c6527de413a0fb0e3fafc9f33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE3 9916 bytes

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