Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e0bced4db0fae0…

MALICIOUS

PDF

36.4 KB Created: 2020-08-25 06:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb6d5aff3b9dad2cc762f5245ed44f6f SHA-1: f58642ba60199b6a469f8328d9c3ba3fa317ac75 SHA-256: e7e0bced4db0fae0a28e2d2e686d355a38a3fa7aaa61127c0840b7cd5e6be176
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.cc. The ML classifier strongly flagged this PDF as malicious. The document body contains garbled text but includes the malicious redirector URL and several other PDF file URLs, suggesting a lure to external 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=despite+and+inspite+of+worksheet
    • http://xipapo.mjhpictures.com/uploads/1/3/1/3/131398455/rizawoseroruwabi.pdf
    • http://files.adoxresearch.com/uploads/1/3/1/3/131378991/nabeda.pdf
    • https://cdn.shopify.com/s/files/1/0435/2950/2874/files/xarozubijekanokisoji.pdf
    • https://cdn.shopify.com/s/files/1/0452/5555/7280/files/pediatric_electrocardiography.pdf
    • https://cdn.shopify.com/s/files/1/0429/8519/3621/files/bowman_field_driver_s_license_louisville_ky.pdf
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/zalebalotije.pdf
    • https://cdn.shopify.com/s/files/1/0451/5794/1402/files/georgia_armenia_azerbaijan_travel_guide_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9067/3813/files/55171017679.pdf
    • https://cdn.shopify.com/s/files/1/0432/0890/0772/files/20721449453.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/chuyn_file_nh_sang_word.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/wezazifolulivadu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3076/4955/files/catalogo_de_mary_kay_julio_2020.pdf
    • https://cdn.shopify.com/s/files/1/0462/6441/8461/files/dikiwaperukujomi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9780/1375/files/22335493447.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_off00005059.bin
01338f784c474fe912185dc9865cb5b5090ffedeb33673bb76ee2a0493001f66
pdf-font-stream PDF embedded font (sfnt) at offset 0x5059 5252 bytes
font_01_sfnt_off00006245.bin
80b1396a72f9ef8ce532ddfe4b1031862777e8c4d139a07e263f85581dccfde7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6245 10360 bytes