Malicious PDF — malware analysis report

Static analysis result for SHA-256 3301ddeedd405b70…

MALICIOUS

PDF

38.6 KB Created: 2020-08-07 12:39:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c656c7769dad4456cbb02411f12d2ed3 SHA-1: 2d1c52329a3e5ab051e88a81f8364552e598c9f8 SHA-256: 3301ddeedd405b70425feba1487b1394e2921e6efaa1dbb560381192e13a9bf9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to external content. The ML classifier strongly indicates maliciousness, and the presence of numerous SEO-optimized PDF links further supports a malicious intent to drive traffic to potentially harmful sites.

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=bayesian+networks+with+examples+in+r+scutari+pdf
    • http://files.irishshepherdshuts.com/uploads/1/3/1/1/131164023/dakiropamol_xifofuxok.pdf
    • http://wuzonapan.wildaboutchristmas.com/uploads/1/3/0/9/130969656/50266dd7902.pdf
    • http://losopilok.michaelmattoongolf.com/uploads/1/3/1/6/131606201/xunubuvagojozepav.pdf
    • http://files.joblakely.com/uploads/1/3/1/3/131384113/topikarete.pdf
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/gold_gym_exercise_chart.pdf
    • https://cdn.shopify.com/s/files/1/0435/6286/0699/files/l_alphabet_grec.pdf
    • https://cdn.shopify.com/s/files/1/0434/0678/6725/files/marvelous_designer_6_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/32466260919.pdf
    • https://cdn.shopify.com/s/files/1/0435/4588/6884/files/sejarah_penjajahan_portugis_di_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7907/files/crhp_manual_online.pdf
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/28351323128.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/18269038786.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_off00005779.bin
9536b1e2e05397c7500526f69c1accf6ddfa27e75a11ce5cf1ee9a871b9c0bc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5779 5772 bytes
font_01_sfnt_off00006b14.bin
43e95050e4594ab2f3a017c63eae60c46efd4945ca35ea9203af461b4de8d937
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B14 10036 bytes