Malicious PDF — malware analysis report

Static analysis result for SHA-256 4297310106d368c0…

MALICIOUS

PDF

40.4 KB Created: 2020-08-09 18:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5466a7945cf5a8fa6a1708b19b5b1ec SHA-1: 33d290d498d7b519e4735a2c3bf36b50a7343245 SHA-256: 4297310106d368c0e8d4aa8e56e5a7f8176d2cc3ded94f49086e016255dad2a5
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, with one specifically identified as a malicious redirector. The document body text is largely obfuscated but contains the same URL as the malicious redirector, suggesting an attempt to lure users to malicious content. The presence of numerous other links to external PDFs indicates a potential link farm or SEO manipulation tactic.

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/pify?keyword=golden+rule+of+capital+accumulation+pdf
    • http://files.bluemountainnsy.com/uploads/1/3/1/3/131380342/mozapusomeside-jitukibobusi-sesakepolure-jajuritaji.pdf
    • http://wimak.azharkennel.com/uploads/1/3/0/7/130776326/8184bef.pdf
    • http://files.kallenakucers.com/uploads/1/3/0/8/130813979/eca2ce5f.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lujodegiduwidixerilaji.pdf
    • https://cdn.shopify.com/s/files/1/0441/3430/1848/files/jefimabajusemezapif.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/82157455760.pdf
    • https://cdn.shopify.com/s/files/1/0428/7932/0223/files/49752851537.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/carpentry_and_joinery_volume_1.pdf
    • https://cdn.shopify.com/s/files/1/0437/8873/0525/files/16_man_bracket.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21096031872.pdf
    • https://cdn.shopify.com/s/files/1/0432/8279/2606/files/67001179087.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/dapevirakasaku.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9164/files/3105276772.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/bioplastic_production_process.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/benuwuxobonawuwavopeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/8660/9573/files/19218958992.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_off00005fc0.bin
dade8b3986fae3b2ff281051140882069c8ae79d0da26ceb3d0a72226c181b67
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC0 5156 bytes
font_01_sfnt_off00007139.bin
aca17c1e821ab409304aed571a0defbab7c0fdca0a084b45b18c449dddd737f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7139 10356 bytes