Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22ebdf753c4d357…

MALICIOUS

PDF

43.0 KB Created: 2020-08-22 17:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7504a97464e7ec04823a56dd6d80b4a SHA-1: 21335d7735560cc4ab0a124b05ca8f27c347e951 SHA-256: a22ebdf753c4d35776f733b2e1a5935a4caa12eddc31d3da8a2295894b51d4c0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=factory+data+reset+android+tv', indicating a lure to a malicious site. The presence of numerous PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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=factory+data+reset+android+tv
    • http://mexasaxi.grovesportsinc.com/uploads/1/3/1/4/131407089/46a55.pdf
    • http://files.cowgirlastrologer.com/uploads/1/3/0/7/130739564/rudedagogu.pdf
    • http://files.prostphxscottsdale.com/uploads/1/3/2/6/132695306/tojikabodajunud.pdf
    • http://files.mj2startups.com/uploads/1/3/0/7/130775838/1401485.pdf
    • https://cdn.shopify.com/s/files/1/0430/1409/5001/files/10535414907.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/doxufofanezu.pdf
    • https://cdn.shopify.com/s/files/1/0438/6134/4406/files/sofamivupi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5509/5712/files/74115232917.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/bofotalulusux.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/dadoxoruxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6289/3471/files/vajoxuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/7185/6026/files/97480853254.pdf
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/brehon_laws.pdf
    • https://cdn.shopify.com/s/files/1/0449/8394/3326/files/9_temperament_traits.pdf
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/22625972494.pdf
    • https://cdn.shopify.com/s/files/1/0447/9886/9653/files/medodometumikuseveg.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bc6.bin
01dce6f0e6a8e635f125f0f366bb487bc25ac79d5bbd447380d8e820f185c5ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC6 5016 bytes
font_01_sfnt_off00007cf3.bin
20f885f58a2c929701b9a358c1f5ce3ea743c5d9e9ec4b9bc0cf5838b75c0628
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF3 9980 bytes