Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a378b1021103f8…

MALICIOUS

PDF

41.5 KB Created: 2020-08-19 06:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 227f345bde10b35d83ea05dc6fcdc09b SHA-1: ce542d1373e6f4498bc09ef4bdbb6587ac0591da SHA-256: a2a378b1021103f8510174846f1d29e82fa5cfdf9a4a2a452f919621fde06c58
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=lifetime+tv+guide+usa', which is flagged as malicious. The presence of a large number of external PDF links, many pointing to Shopify domains, suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, limiting the analysis of direct payload execution.

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=lifetime+tv+guide+usa
    • http://gaxin.jillrumley.com/uploads/1/3/1/4/131437601/9787794.pdf
    • http://nofavelan.evavoutsaki.com/uploads/1/3/1/6/131636761/figegik-jubudo-faxafo.pdf
    • http://rebepezaz.natural-hacks.com/uploads/1/3/1/4/131406390/sinipewad_zenebetotewa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7202/7814/files/must_have_android_apps_august_2019.pdf
    • https://cdn.shopify.com/s/files/1/0439/6656/2462/files/cyclops_depth_module_mk1.pdf
    • https://cdn.shopify.com/s/files/1/0435/0191/2224/files/80075567074.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mapitawaluzosamorexub.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/12653714833.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/dimezose.pdf
    • https://cdn.shopify.com/s/files/1/0433/7362/5500/files/how_to_treat_coliform_bacteria_infection.pdf
    • https://cdn.shopify.com/s/files/1/0429/9420/4825/files/94107820056.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/demakidazikibojuguvip.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_off00005a66.bin
23a922983be3e78c6beaabbf7bf108ab96ac22fd279abe887183dab39d3e26a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A66 5100 bytes
font_01_sfnt_off00006bc2.bin
a306adfbc2aff2559b002c06fca90eb9b59cae13f6854480430e40d4387344d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC2 14620 bytes