Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8e3da23f3bb2a8…

MALICIOUS

PDF

37.3 KB Created: 2020-08-07 13:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b21681cca8d4543300fb101f5559b9c SHA-1: 8952f1e49aeae780fcf44ea0c4bb1d1ac26c4b74 SHA-256: 0e8e3da23f3bb2a82ea5dc82a2c1232dc86b3bcbdb4fa1e86fcadbb60ba42317
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes text suggesting a lure related to 'anatomy of hand and wrist pdf' and a URL that appears to be part of a link farm. The presence of multiple Shopify URLs, some marked as benign, alongside the malicious redirector, suggests an attempt to disguise malicious activity within a larger collection of links.

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=anatomy+of+hand+and+wrist+pdf
    • http://files.amandacasale.com/uploads/1/3/1/8/131871740/8872462.pdf
    • http://gojig.financewebapps.com/uploads/1/3/1/0/131069839/sufagitufewiz-jadoxomitum.pdf
    • http://files.oatsandhoney.org/uploads/1/3/1/0/131070566/7acd7b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2536/7194/files/grammar_and_writing_practice_book_grade_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/zikikitajolafinuvaxobuju.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/7751799303.pdf
    • https://cdn.shopify.com/s/files/1/0429/5553/8591/files/damedofapuzoxijexizufiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/mugid.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/42314576920.pdf
    • https://cdn.shopify.com/s/files/1/0434/3103/5032/files/85733825555.pdf
    • https://cdn.shopify.com/s/files/1/0435/5653/6479/files/jatisejixosigipujej.pdf
    • https://cdn.shopify.com/s/files/1/0434/1936/9639/files/yasin_suresi_turkce_okunusu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/75191365259.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_off0000548d.bin
286ea4fbfda9ca94f0a3235c12d31d5f0125f5447eb88943313e0c11939d9513
pdf-font-stream PDF embedded font (sfnt) at offset 0x548D 5432 bytes
font_01_sfnt_off000066f9.bin
674e91bf1f235ac63c5b7e985c69fdea75a42d846c2e91413ad5370fc965b405
pdf-font-stream PDF embedded font (sfnt) at offset 0x66F9 9880 bytes