Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f7f2debcc751fc…

MALICIOUS

PDF

65.0 KB Created: 2020-08-19 04:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba04c86b07d2cd0496b9bfffca326673 SHA-1: 9af77cb12f67ac3749b8dfe2a75b94317fdb5560 SHA-256: 14f7f2debcc751fcec2e66b369c47e580c9be09b331c4c90e5fa65dae67725b9
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This indicates an attempt to redirect the user to a malicious site, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of 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.com/pify?keyword=ion+transport+through+cell+membrane+pdf
    • http://files.happytailsdogrescue.org/uploads/1/3/1/4/131437941/3370070.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5543/8241/files/eos_rebel_t5_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/zufarurubote.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/dojoza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/96067091899.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/reboxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/44689933458.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/sentence_word_order_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/80697111492.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/terunut.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/9137950999.pdf
    • https://cdn.shopify.com/s/files/1/0428/5795/5494/files/finding_gcf_and_lcm_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/pitiluwipire.pdf
    • https://cdn.shopify.com/s/files/1/0456/8544/0671/files/16276571250.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_off0000c1b4.bin
c7551f68254ce0d4a9db045bfd6b8f4b7b8038bbff8c26c67b02ef6871b6ea1e
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B4 5648 bytes
font_01_sfnt_off0000d4b3.bin
aa69c27f4fe05cdc73dbb3e444ffd60c8c3293a40907da186e43d3e644a69671
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B3 10008 bytes