Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b29273be807e067…

MALICIOUS

PDF

48.1 KB Created: 2020-07-30 21:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5f0b020f70263d3c0dc857e967c0d3f SHA-1: 12744a5c11133f600c668423c03065d45071a2eb SHA-256: 4b29273be807e06713063e400b48d8245695a3886476c709c513d72042783e7d
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it links to known malicious infrastructure. The document body, though heavily obfuscated, appears to be a lure related to a 'bug out bag packing list'. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a further stage of the attack. The ML classifier also strongly flagged this PDF as malicious.

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=bug+out+bag+packing+list+pdf
    • http://files.jrharalson.com/uploads/1/3/1/3/131380337/103681.pdf
    • http://files.designerfundraising.org/uploads/1/3/1/1/131163953/bowubufigolagos_keketuwokare_jezesenunob_vazogufewaxi.pdf
    • http://files.mactire.ie/uploads/1/3/1/3/131398526/pigeg.pdf
    • https://cdn.shopify.com/s/files/1/0436/4923/7145/files/35856686459.pdf
    • https://cdn.shopify.com/s/files/1/0433/3636/8283/files/31359154685.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98029452840.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/35329043599.pdf
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/32724729414.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/75193093548.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/kotigewonizitikedexiwek.pdf
    • https://cdn.shopify.com/s/files/1/0428/4927/1975/files/rejusutujo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/28521534432.pdf
    • https://cdn.shopify.com/s/files/1/0433/2018/0894/files/falajaxonatuvok.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/posesawodapulizeza.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/63228120141.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_off00007d60.bin
91f3960c16e6d338781f83063bf84409b95c80dafb3e4653fca1e5a14d21a8db
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D60 5244 bytes
font_01_sfnt_off00008f40.bin
5cfc461c8239dc75b75251792b961d995ab4f1b110baf147522a4ad82e3fe977
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F40 10488 bytes