Malicious PDF — malware analysis report

Static analysis result for SHA-256 727e82f40291607c…

MALICIOUS

PDF

40.5 KB Created: 2020-08-19 13:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b26fbd48da5bd4c17828210eed870447 SHA-1: 8b5ce2aa124ac04b6e05a6553b0025f2095fa5de SHA-256: 727e82f40291607cdc83224f4bdbe59a718c905c1bbef95eeab0db7f793d150e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link redirects to malicious infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=android+mod+games+new, which is flagged as a malicious redirector. This suggests the document is designed to trick users into downloading potentially harmful content by masquerading as a game download. No scripts were extracted, but the presence of embedded URLs and the ML classifier output strongly indicate malicious intent.

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.cc/pify?keyword=android+mod+games+new
    • http://files.pempickleball.com/uploads/1/3/1/3/131397927/guzilasadavodu-navadajeluluv-dawikotiwuw-jiluvofutux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0806/3649/files/caterpillar_t30d_forklift_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/96813667141.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdf
    • https://cdn.shopify.com/s/files/1/0439/2747/0235/files/batof.pdf
    • https://cdn.shopify.com/s/files/1/0433/2408/0282/files/35462725799.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/13897010054.pdf
    • https://cdn.shopify.com/s/files/1/0438/1887/7085/files/33577855668.pdf
    • https://cdn.shopify.com/s/files/1/0440/3838/9925/files/65923261128.pdf
    • https://cdn.shopify.com/s/files/1/0437/6202/4605/files/ebola_virus_infection.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_off0000613e.bin
aa038af2482d6a53b2c2e6b981c5e7ba5a4008d03a7c7b8a0963a0ded2fab054
pdf-font-stream PDF embedded font (sfnt) at offset 0x613E 5192 bytes
font_01_sfnt_off000072d6.bin
25effdb7258dee10afa4b51f78980d92e15710a96258ca0d90809bfd93715ad5
pdf-font-stream PDF embedded font (sfnt) at offset 0x72D6 10212 bytes