Malicious PDF — malware analysis report

Static analysis result for SHA-256 147a29b45ccbc15f…

MALICIOUS

PDF

52.5 KB Created: 2020-08-06 12:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd52a105ef08a5c5344d299980db9f08 SHA-1: cb525068182ebab5e06afb57d899d3f1ef4bb828 SHA-256: 147a29b45ccbc15fbd2778bfc81edae5ad0ed0b996a336d6d0811a1aa2056ae8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or redirection scheme. One of the primary links, 'https://ttraff.ru/pify?keyword=carbon+cycle+pdf+answers', is identified as a malicious redirector, indicating an attempt to lead the user to a harmful destination. The presence of numerous Shopify links, while some are benign, contributes to the overall deceptive nature of the document.

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.ru/pify?keyword=carbon+cycle+pdf+answers
    • http://buvovide.embracingliterature.com/uploads/1/3/1/4/131483108/gepopu_zajubi.pdf
    • http://files.surrenderedtochrist.org/uploads/1/3/2/6/132681656/wulegi.pdf
    • http://files.ltapostolic.org/uploads/1/3/0/8/130813364/84cdb.pdf
    • http://files.adriannabeautyllc.com/uploads/1/3/0/9/130969241/929953.pdf
    • http://files.royalgymnastics.com/uploads/1/3/0/7/130775441/958381.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96512150342.pdf
    • https://cdn.shopify.com/s/files/1/0432/4763/2548/files/kupumemitifepaxavesi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0817/8850/files/3491006903.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0581/files/calvin_cycle_explanation.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/26910183779.pdf
    • https://cdn.shopify.com/s/files/1/0430/9752/2329/files/dogebu.pdf
    • https://cdn.shopify.com/s/files/1/0449/6467/5752/files/school_mate_2.pdf
    • https://cdn.shopify.com/s/files/1/0438/1471/5549/files/cbx500_datalogic.pdf
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/64246484366.pdf
    • https://cdn.shopify.com/s/files/1/0428/5041/8847/files/livasasoranutumeresi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/66861883437.pdf
    • https://cdn.shopify.com/s/files/1/0433/5386/6408/files/32788579177.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_off00008e6e.bin
94587e15aa0f9ac7e65df9d2fbd4a2b1392876e9356f42e702c3d111b37620dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6E 5388 bytes
font_01_sfnt_off0000a0df.bin
6c51bb8cf6805d784ce8e1025a509d31d619eb7fd62d3b8fac05d2fd99e845ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0DF 10680 bytes

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