Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f40dbac08eef40…

MALICIOUS

PDF

38.7 KB Created: 2020-08-31 06:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81a42c73965cdd927492b16189dd8221 SHA-1: 20fcd9703f569846521d62fe6a82ccba61244b46 SHA-256: 06f40dbac08eef40cf8bdb6217a85044aa51f1ac247f791fc573dc94f8ed54a3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to lure unsuspecting users to malicious content. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=replicas+de+bolsas
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8034/1917/files/2005_honda_rincon_650_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/9127/1586/files/reto_knutti_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/6001/0912/files/deminapubaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/bengali_alphabet_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0439/9664/3486/files/fabopisejunijesufuxebok.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdf
    • https://cdn.shopify.com/s/files/1/0432/6077/2516/files/bajaj_allianz_life_goal_assure.pdf
    • https://cdn.shopify.com/s/files/1/0429/2290/1663/files/xixekaworiwuwo.pdf
    • https://static.usrfiles.com/ugd/89064d_0163f3ff862e4917aeb820d584a3da9d.pdf
    • https://static.usrfiles.com/ugd/f1d680_dce3f45a58d74f379ed0c26eea728f22.pdf
    • https://static.usrfiles.com/ugd/2074c9_f1fbddf87e294a898e8ee5c71910a5d1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/dwg_viewer_convert_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5907/files/31624132867.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_off0000559e.bin
f04a39e827525b5257c48ef50255cdfc815b75e718642c2e12caa2b9791b9345
pdf-font-stream PDF embedded font (sfnt) at offset 0x559E 5116 bytes
font_01_sfnt_off0000670d.bin
20ff8e4b36f1111142475f477604c40fcc55fa5f3429d4ed53708273ac0b40ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x670D 11828 bytes