Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b4307ac3298995…

MALICIOUS

PDF

43.2 KB Created: 2020-08-23 17:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee44c244a52b61a80ec74059a4fa16ba SHA-1: 868d971523a8fd7823b1caca302b4bcb7cecda98 SHA-256: a6b4307ac329899559191bc4daf8d6496cb99316825e353ff706b9c4a92076e7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=bioaccumulation+definition+pdf'. Another critical heuristic identified it as a PDF link farm, with many links pointing to Shopify domains. The ML classifier also strongly flagged this PDF as malicious. The combination of these factors suggests a campaign focused on SEO manipulation or redirecting users to malicious content.

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=bioaccumulation+definition+pdf
    • http://files.circmfarms.com/uploads/1/3/1/6/131606630/rodatofuzavuxe.pdf
    • http://files.chrismostyn.com/uploads/1/3/1/8/131856949/sopolonatuge.pdf
    • http://files.myparkconnect.com/uploads/1/3/1/4/131407647/nefuzuzo-pafuwipalitex-kimadux.pdf
    • http://xavepu.shantyshackbrewing.com/uploads/1/3/0/8/130814124/tivogawuwog.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/rodosetibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/75545074557.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/88085723249.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4568/files/enter_the_gungeon_coin_crown.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1660/files/pl_sql_code_formatter_notepad.pdf
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/tovukinafovemugonukaloga.pdf
    • https://cdn.shopify.com/s/files/1/0429/1067/9203/files/google_docs_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/beginner_guide_to_stock_market.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5877/files/wrangler_outdoor_series_performance_shirts.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_off00006c7b.bin
9051997cb8546b8f74cceaa140ac7e060f358a6536e0d64a36b184f1b4ec89c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7B 5076 bytes
font_01_sfnt_off00007dad.bin
467b6776dc67de59c4ef977b6671185e59746cf4744cb5f074fd18ac9cc1eb6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAD 9992 bytes