Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b61085410b7d3e…

MALICIOUS

PDF

37.2 KB Created: 2020-08-21 20:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fc8ca989af14704088554c820aa836d SHA-1: 9cc453edebf97584bbbe76d8b4a8d0de62f4ff66 SHA-256: d9b61085410b7d3eba0fcf5fdcbc4568eb47947f679d4b7024b34152597a010c
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains references to 'Android back arrow icon png' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a potential link farm used for SEO poisoning or to obscure the final malicious destination. No scripts were extracted from this sample.

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=android+back+arrow+icon+png
    • http://levuxupu.asdarchitects.com/uploads/1/3/1/8/131856166/rudepadaxubabokelepo.pdf
    • http://rarujinaf.objectpages.com/uploads/1/3/1/4/131453872/jogadug_falerun_visimuleve_fibawesazu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/basic_aikido_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0438/2975/6066/files/80007852401.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0827/files/41465699781.pdf
    • https://cdn.shopify.com/s/files/1/0432/0247/8242/files/estrategias_de_afrontamiento_emocional.pdf
    • https://cdn.shopify.com/s/files/1/0429/8188/4067/files/aura_libro_resumen.pdf
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/54143007719.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/73587469612.pdf
    • https://cdn.shopify.com/s/files/1/0437/7359/1703/files/71386841720.pdf
    • https://cdn.shopify.com/s/files/1/0439/1400/2587/files/veligalosa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/chuyn_file_nh_sang_word.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_off000047d8.bin
f0d31061f921e253192df5dd04a4ddd633afff24b44237e196740f3b70b5d757
pdf-font-stream PDF embedded font (sfnt) at offset 0x47D8 5316 bytes
font_01_sfnt_off00005a05.bin
cab863ae5b13568855592e92e3433c8b783d7af25310770417b38f46332037e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A05 14900 bytes