Malicious PDF — malware analysis report

Static analysis result for SHA-256 8428415528d436b6…

MALICIOUS

PDF

50.3 KB Created: 2020-08-22 19:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1170ae1ca777a3dd816f7c774e42315 SHA-1: 1b61679bf3ec559cc415ea4b7f78fbb992180235 SHA-256: 8428415528d436b671070f54bb97e29fe50a31747deb6e117aee3acfe56a4acb
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 a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. These factors suggest the document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

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.ru/pify?keyword=ethical+egoism+example+in+information+technology
    • http://files.landusesustainabilityjournal.org/uploads/1/3/0/9/130969509/44c3af43f0.pdf
    • http://files.gmf.ch/uploads/1/3/1/4/131438142/3402403.pdf
    • http://files.hollywoodmixstudios.com/uploads/1/3/0/7/130739895/8467522.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/kewazemegefesoxanegunoku.pdf
    • https://cdn.shopify.com/s/files/1/0432/1152/2209/files/dimufubabimuxaniberekupob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zafon.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/83443649988.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/11833285923.pdf
    • https://cdn.shopify.com/s/files/1/0436/8901/7497/files/pobonikogun.pdf
    • https://cdn.shopify.com/s/files/1/0431/1678/9927/files/xagegizugesej.pdf
    • https://cdn.shopify.com/s/files/1/0434/8729/7696/files/65662099743.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4024/files/96147988099.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/vomol.pdf
    • https://cdn.shopify.com/s/files/1/0437/9970/7810/files/11693215321.pdf
    • https://cdn.shopify.com/s/files/1/0429/7247/9647/files/vanedijupujofusigefedaf.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_off0000867f.bin
ef4b6255255ef05ac41988f76fc7a733a38eecfb2ce6ca1714da9c0c81b15113
pdf-font-stream PDF embedded font (sfnt) at offset 0x867F 5556 bytes
font_01_sfnt_off0000994f.bin
dbdeaed77a827f74907c9a604f47636f82d77a14d8c8dfddecfabc8f27495805
pdf-font-stream PDF embedded font (sfnt) at offset 0x994F 10256 bytes