Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc167d0dd62b612…

MALICIOUS

PDF

44.7 KB Created: 2020-08-16 21:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bf1cca391d863ab351dd661deddbe92 SHA-1: 42764acc4179b557c38bd91595ac6d683cf6631b SHA-256: 5fc167d0dd62b61225c4d30154575f55368f6443a8bd58851ed16c102f5ebe29
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'Android 10 not charging' and a URL, suggesting a lure to a scam or phishing page. The presence of numerous external PDF links further indicates a link farm designed to distribute malicious content or traffic.

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=android+10+not+charging
    • http://files.unityofpalmyra.org/uploads/1/3/0/7/130775827/0d2098eedc2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5469/3541/files/watojoxeruxoluvarixeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2771/files/alimentacion_saludable_introduccion.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/ramebajasapenerigogu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9863/files/74489180344.pdf
    • https://cdn.shopify.com/s/files/1/0440/8547/7541/files/fujumivukufixezagipitinop.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/bpsc_answer_key_with_question.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/the_duchess_of_malfi_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/vumomuloxolo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4156/1503/files/sitanukozorijudipemumolot.pdf
    • https://cdn.shopify.com/s/files/1/0432/9370/4350/files/31837815409.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/pittsburgh_tv_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/nepagupodijedebeto.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_off000071b0.bin
9269c09359ec5a60f6aa3a5adfb76077346de77ee6a539309effed5b715a1a2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x71B0 5176 bytes
font_01_sfnt_off00008340.bin
f33c597abb4db02d3acec9008b119092848a4c8a4b77a70027316d1959e324de
pdf-font-stream PDF embedded font (sfnt) at offset 0x8340 10360 bytes