Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f20860ecbed81ea…

MALICIOUS

PDF

45.0 KB Created: 2020-08-24 14:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e49b954de8409b9f47f8d84178671dce SHA-1: 6e7c70b31291dee6c8b282cec4357035f69632a6 SHA-256: 6f20860ecbed81ea89e758494ffeb385fa0778e88affded70c9a4581446a0a01
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, includes a recipe title and the malicious URL, suggesting a lure to a link farm or phishing site. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=easy+moist+white+sheet+cake+recipe
    • http://dagobaro.lakesideschnauzers.com/uploads/1/3/0/7/130739964/bululevakikav_petoreva_gotovudusigoji_gezovukepigil.pdf
    • http://kubofofa.happybuddha-aruba.com/uploads/1/3/1/4/131455328/pogajidokas-gexikitigegek-doxewekujem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/4189/7110/files/24865541787.pdf
    • https://cdn.shopify.com/s/files/1/0433/5111/3883/files/thank_you_letter_for_donation.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8233/files/selodufelibulumiviriboda.pdf
    • https://cdn.shopify.com/s/files/1/0438/3444/1885/files/matlab_5th_edition_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/9168/0666/files/aleatha_romig_cunning.pdf
    • https://cdn.shopify.com/s/files/1/0462/1503/7082/files/73963451196.pdf
    • https://cdn.shopify.com/s/files/1/0452/4684/0994/files/kevijiso.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/como_leer_el_aura_libro.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000687b.bin
6b9ad45b90ae10162ecb4914691cf4714b2a89ac8d6654811adcd1a3c10f816a
pdf-font-stream PDF embedded font (sfnt) at offset 0x687B 5356 bytes
font_01_sfnt_off00007aa0.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA0 1800 bytes
font_02_sfnt_off0000832e.bin
7b31afcbb3b9a2b683956d8d2864c5da3a4d2a99ea6e754986ca57377d2da7d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x832E 10564 bytes