Malicious PDF — malware analysis report

Static analysis result for SHA-256 10935ef60560e288…

MALICIOUS

PDF

37.5 KB Created: 2020-08-12 16:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a6e075df33f32629d79efeafb0b500f SHA-1: e79c852fa736cb322c8830ced58d07d1b9e88a9a SHA-256: 10935ef60560e288c2f74c129062b59b14268016a87ce20ee21a4a335596ec82
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though partially corrupted, contains text related to 'Adobe pdf pro 9 download' and includes the primary malicious URL. This suggests a phishing or scam attempt to trick users into downloading unwanted or malicious software.

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=adobe+pdf+pro+9+download
    • http://files.lordslandscaping.com/uploads/1/3/1/6/131607163/2928249.pdf
    • http://files.thefinishdepot.com/uploads/1/3/0/7/130740252/duzevepi.pdf
    • http://files.apostolicdeliverancefive.org/uploads/1/3/0/9/130969761/e3f0c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0213/3667/files/open_file_in_browser_c_asp._net.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8080/files/gefuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8215/4135/files/bautagebuch_vordruck.pdf
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/54189184770.pdf
    • https://cdn.shopify.com/s/files/1/0435/2727/4645/files/44751357391.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8101/files/vukaxavaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/julanefiwozuxam.pdf
    • https://cdn.shopify.com/s/files/1/0438/5095/6960/files/super_mario_world_nes.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/21164807651.pdf
    • https://cdn.shopify.com/s/files/1/0429/6291/1391/files/88477332996.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9452/files/aarp_landing_party.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057c5.bin
acc1c5c38ab276c4b6fe1037ca01a2b84d343eaf1b787cf5e7639ae8d88ce377
pdf-font-stream PDF embedded font (sfnt) at offset 0x57C5 5232 bytes
font_01_sfnt_off000069b1.bin
7b7b69aef3b3e8ef0e18e498a6bc31fb94eaf0d0ded4d8cb51084b44eddb9a77
pdf-font-stream PDF embedded font (sfnt) at offset 0x69B1 9332 bytes