Malicious PDF — malware analysis report

Static analysis result for SHA-256 f848f19465b1fe6d…

MALICIOUS

PDF

46.0 KB Created: 2020-07-27 13:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 356486f10176e1d70552f250eb9cdff7 SHA-1: 1b23260cdc61dd430f21e26b3dfcbc64c21daaed SHA-256: f848f19465b1fe6db23cd637279ffcc9e656ef5d2fe41425766845173a1b65ec
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify, suggesting an attempt to distribute or redirect to malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector and link farm indicates a likely phishing or malware distribution attempt.

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=capteur+de+temperature+avec+arduino+pdf
    • http://files.communityactionboonewinn.org/uploads/1/3/0/7/130775116/4e7630651.pdf
    • http://files.legsonwheels.com/uploads/1/3/1/4/131454503/5ef1c3.pdf
    • http://files.wallsofwondersaddlebrooke.com/uploads/1/3/1/3/131380467/41856e48f4713.pdf
    • http://files.joelallisonbassbaritone.com/uploads/1/3/1/3/131398113/lejezorupabotev_jikure.pdf
    • http://files.joelalli
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/foxipoxiwevufor.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/43196370733.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/29716679719.pdf
    • https://cdn.shopify.com/s/files/1/0431/1062/9532/files/fuxanijogab.pdf
    • https://cdn.shopify.com/s/files/1/0429/4469/2383/files/84700939173.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vebamuwonodivori.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/papudamug.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/43392024076.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/10020623056.pdf
    • https://cdn.shopify.com/s/files/1/0434/3755/5864/files/muwiwisozegekufazol.pdf
    • https://cdn.shopify.com/s/files/1/0433/2158/9913/files/jizuzejuvijutef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.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_off00006ce1.bin
83f849f75dcd6c7d065a90cb463f9d79e976bb5c6312e83e2b80f4c9919f5942
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE1 5056 bytes
font_01_sfnt_off00007e0b.bin
c7d76f6d2fac85f2d37c23b388930204775a1861321e598a52f54bf4ab9105a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0B 14132 bytes