Malicious PDF — malware analysis report

Static analysis result for SHA-256 159dee338e042201…

MALICIOUS

PDF

42.8 KB Created: 2020-08-25 08:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78db0cbdd5281f94d2e82db7a9716679 SHA-1: 8f55d7eb55ac54626b21cadb4051dd8437d8f42d SHA-256: 159dee338e042201ead2fdc421372e05d5f6a1393bb2adb01e5452f6cb0ac64e
194 Risk Score

Malware Insights

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

The PDF document contains embedded links and text that attempt to trick users into believing it is a file conversion tool. It directs users to a malicious redirector URL and hosts a large number of links to other PDF files, likely for SEO manipulation or to distribute further payloads. The presence of a password-protected archive lure suggests an attempt to bypass security scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.ru/pify?keyword=transformar+arquivo+de+autocad+em+pdf
    • http://files.katjasymons.com/uploads/1/3/2/6/132682295/8276184.pdf
    • http://files.johnnyhayes.net/uploads/1/3/1/3/131380345/0ad4b9357a1c64c.pdf
    • http://files.mcmillanvetclinic.com/uploads/1/3/1/8/131872178/siterixuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1301/2641/files/99991505311.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dosodasanofesawule.pdf
    • https://cdn.shopify.com/s/files/1/0428/5467/8687/files/badagu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/laralopazeruvokewo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2666/9987/files/44816342115.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/facebook_marketing_blueprint.pdf
    • https://cdn.shopify.com/s/files/1/0431/3566/4284/files/64107371405.pdf
    • https://cdn.shopify.com/s/files/1/0435/8632/2600/files/halloween_bingo_printable_free.pdf
    • https://cdn.shopify.com/s/files/1/0455/4991/2229/files/add_audio_to_video_apk.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_off0000655f.bin
b0d3f161bd0ca2e2e6f24219464b22ef1d14b7887f8b7703302dd941da7c3e40
pdf-font-stream PDF embedded font (sfnt) at offset 0x655F 5404 bytes
font_01_sfnt_off000077ac.bin
0a3988c91eea433e4e7d961b505aa2c594de75c6be3ab4f92144597b4b173813
pdf-font-stream PDF embedded font (sfnt) at offset 0x77AC 12064 bytes