Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d53567998b40074…

MALICIOUS

PDF

45.2 KB Created: 2020-08-01 13:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe7285f767e19123fb46d7c4289540ef SHA-1: ded8de8aa3eceb9e87a77d1cbdbc474937f27e5f SHA-256: 0d53567998b40074f94dbe075daaa83b58c3323ff2be15e5bbacbc01ad108e65
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector, suggesting the primary purpose is to lure users to malicious sites.

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=not+enough+items+1.+13.+2
    • http://files.gilchristwhatnot.com/uploads/1/3/1/8/131856991/wepesebenemitaf.pdf
    • http://files.builderandhawk.com/uploads/1/3/1/6/131637148/bopekav.pdf
    • http://files.rccwood.com/uploads/1/3/1/1/131164475/b13a2f.pdf
    • http://files.katbalames.com/uploads/1/3/1/1/131164024/xetitaxuwigidiw_torazuxode.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2620/9175/files/set_up_local_host.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/xusigenejeriwoleg.pdf
    • https://cdn.shopify.com/s/files/1/0435/4709/9290/files/46260950066.pdf
    • https://cdn.shopify.com/s/files/1/0433/0510/7620/files/46257532708.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/bekagoxetamop.pdf
    • https://cdn.shopify.com/s/files/1/0432/8708/5220/files/futudokunuwugagofesomu.pdf
    • https://cdn.shopify.com/s/files/1/0438/7602/4475/files/zobata.pdf
    • https://cdn.shopify.com/s/files/1/0436/2135/1587/files/calculus_the_classic_edition_swokowski.pdf
    • https://cdn.shopify.com/s/files/1/0428/6716/3302/files/kigasipuberulole.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/asap_rocky_live_love_asap.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/52265965239.pdf
    • https://cdn.shopify.com/s/files/1/0436/9920/8346/files/togabekopatujekamufej.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_off0000713e.bin
e2eccea03bc0186b0f8f3f7cabd57879939e79cfaf59c47230756b114303e3c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x713E 5112 bytes
font_01_sfnt_off00008297.bin
db66be36a41be9e62b71880e47a585e6103c5e1d054b94a2e18d71c06e3a89d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8297 10868 bytes