Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e86597f563f8ad1…

MALICIOUS

PDF

37.9 KB Created: 2020-07-30 16:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ed70c6b08868e7ee3aa6f20c01ed5b2 SHA-1: 67c17a421d84a7399eb7b25720f2a54b63816348 SHA-256: 0e86597f563f8ad18b5276c94f07658d9801a9e7cd944e287e7c31b8e153e494
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document's primary purpose is to lure users to malicious sites, likely for phishing or to download further malware.

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=amelia+bedelia+helps+out+pdf
    • http://files.blackstarcustoms.com/uploads/1/3/1/6/131636712/77447c.pdf
    • http://files.zetakappakappa.org/uploads/1/3/0/8/130874510/wexexasagumagit-magobelalasufa.pdf
    • http://files.mitsuhiro-ikeda.com/uploads/1/3/0/9/130969761/f88e9e1ff5af.pdf
    • http://files.mathiasmarketing.com/uploads/1/3/2/7/132740511/a05a9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3462/4679/files/86427233119.pdf
    • https://cdn.shopify.com/s/files/1/0430/2009/1555/files/wapuximatakesekik.pdf
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/3505943792.pdf
    • https://cdn.shopify.com/s/files/1/0429/4996/8035/files/47307499194.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/wulopurorenipawem.pdf
    • https://cdn.shopify.com/s/files/1/0429/4252/9695/files/vavelulusowigavor.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/gurivunawixabitagosozid.pdf
    • https://cdn.shopify.com/s/files/1/0436/0408/2851/files/31257575297.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdf
    • https://cdn.shopify.com/s/files/1/0439/8258/6014/files/wuwiwufanarubek.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4642/files/vipedafuwonim.pdf
    • https://cdn.shopify.com/s/files/1/0438/5426/6533/files/komeba.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_off000057ea.bin
eac5a8cb7ad797f592f444e888651851735d82294b247a2f148c1a74207f49b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x57EA 5088 bytes
font_01_sfnt_off00006937.bin
a54e86bb6048c11ab8dae4028ddb5f3959c58359bd019f905059caa11f0dd868
pdf-font-stream PDF embedded font (sfnt) at offset 0x6937 9288 bytes