Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d6224607fa923d…

MALICIOUS

PDF

42.8 KB Created: 2020-08-07 13:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f04774b570d7ddd2b2159ddab46afff SHA-1: 6dcda1d81dc00c118f8eab0f04f0ba0049bdd90d SHA-256: 62d6224607fa923d724b0c444aec07457bb0d0727236d98a795080117da3dc8f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'income statement items'. The presence of a link farm and a critical heuristic firing for malicious redirector links strongly indicates a phishing or malware distribution attempt. No scripts were extracted, but the embedded links are the primary vector.

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/wb?keyword=income%20statement%20items%20pdf
    • http://files.londonsdj.uk/uploads/1/3/1/4/131437657/xiletojipi.pdf
    • http://files.baldwincountybossbabes.com/uploads/1/3/1/0/131071157/xokuputab-fiwalanipowupij-zuxazejibo.pdf
    • http://files.rebeccabryant.org/uploads/1/3/1/4/131453733/9214773.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6141/9927/files/boxuwot.pdf
    • https://cdn.shopify.com/s/files/1/0437/4655/8106/files/all_algebraic_formula_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5020/4316/files/folerasum.pdf
    • https://cdn.shopify.com/s/files/1/0436/9232/7077/files/61468399062.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/jaliwapivafunewawap.pdf
    • https://cdn.shopify.com/s/files/1/0432/8374/2884/files/dodunulaledatuxuxibetal.pdf
    • https://cdn.shopify.com/s/files/1/0435/4634/5640/files/delinedel.pdf
    • https://cdn.shopify.com/s/files/1/0432/1073/5780/files/getowezemonowup.pdf
    • https://cdn.shopify.com/s/files/1/0432/6716/2276/files/46969554373.pdf
    • https://cdn.shopify.com/s/files/1/0438/8772/2648/files/john_deere_440.pdf
    • https://cdn.shopify.com/s/files/1/0440/1741/8405/files/55805413659.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_off00006b51.bin
ea699074a6344eb2572531356ff84ab4206b932922f6c9df6120a7f1ac41e3fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B51 5108 bytes
font_01_sfnt_off00007ca7.bin
6b433326fef86a7197b21126909701674dc09df79d725ebf864a6f9c9cbd7456
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA7 9976 bytes