Malicious PDF — malware analysis report

Static analysis result for SHA-256 e08bb38548e25210…

MALICIOUS

PDF

35.7 KB Created: 2020-08-20 13:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3f6bd12401f624cd15082e9a63eba0a SHA-1: 4d1c56c16863fc46acf76fc908f97b425db0fae2 SHA-256: e08bb38548e252103349b5c91c4f920a6f5986bf36a93907a64407df6ae66e3f
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The document body contains numerous embedded URLs, including a suspicious link to 'ttraff.com' which is known for redirecting to malicious content. The presence of a large number of external PDF links, many hosted on Shopify, suggests an attempt at SEO manipulation or a large-scale phishing campaign.

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=gurteen+jacket+size+guide
    • http://files.ocwpublishing.com/uploads/1/3/0/8/130873810/ca10de.pdf
    • http://files.eveliinasuonto.com/uploads/1/3/0/7/130776167/7085903.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/jufazixesovevawus.pdf
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/56700937912.pdf
    • https://cdn.shopify.com/s/files/1/0437/1211/8952/files/5e_ranged_attack_in_melee.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/tonosarevitizulodasaxaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2704/6298/files/zelaxusafomijoloxugesa.pdf
    • https://cdn.shopify.com/s/files/1/0447/4486/7994/files/suikoden_3_characters.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/2005_yamaha_v_star_650.pdf
    • https://cdn.shopify.com/s/files/1/0435/5611/0487/files/33047481060.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/how_do_i_open_disk_utility.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/lokazuli.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_off00004d0e.bin
bf473f1ad2bbeb0ec095d80510ba795c85cf8aa04204b42ee72231b83b03ead0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D0E 5296 bytes
font_01_sfnt_off00005f35.bin
b18086173b5e7c0762b33fe259dd42a60fe716ef4424218c545094ba40f68d79
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F35 10212 bytes