Malicious PDF — malware analysis report

Static analysis result for SHA-256 12533ac27efef53d…

MALICIOUS

PDF

46.0 KB Created: 2020-08-31 00:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b68b5c4df0c6d284638f8338f6ba74f6 SHA-1: 2dc863774460077b0aa7fdacdd38c422a8c6fb89 SHA-256: 12533ac27efef53d82e9318ab87f7b5530ef71a17eca8526db2f1fde1cdf1837
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which, 'https://ttraff.com/wix?keyword=serial+number+for+otterbox', is flagged as a malicious redirector. The document also features a large number of external PDF links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, supporting the classification of this PDF as a malicious lure.

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.com/wix?keyword=serial+number+for+otterbox
    • http://bltlly.com/15wwr1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/7430/6719/files/84078311946.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/ielts_listening_maps_diagrams_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/14475860940.pdf
    • https://cdn.shopify.com/s/files/1/0439/0292/7003/files/stock_certificate_template_google_docs.pdf
    • https://cdn.shopify.com/s/files/1/0431/5388/3293/files/56166979969.pdf
    • https://cdn.shopify.com/s/files/1/0431/9097/6673/files/fiche_technique_aviculture.pdf
    • https://cdn.shopify.com/s/files/1/0435/4729/5898/files/moduvopimupowodiludeji.pdf
    • https://cdn.shopify.com/s/files/1/0431/4926/3004/files/11283631529.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dazekenikajupupapunel.pdf
    • https://static.usrfiles.com/ugd/b8c837_45ece43204814a668f4ebf9875de5ab5.pdf
    • https://static.usrfiles.com/ugd/d55797_11fb12625ae441ff8c53d80d1cef1ce5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006767.bin
e0752128ed1807c6bbd122aca47609f9439100759fadc224b7e58cb8e18b570e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6767 4928 bytes
font_01_sfnt_off0000780e.bin
34b163aed4b4ef201615832dea7ef49383a4259cc68a476dc825e20e01f175aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x780E 11380 bytes
font_02_sfnt_off00009db1.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB1 4324 bytes