Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb8bb63d036f93fe…

MALICIOUS

PDF

39.3 KB Created: 2020-08-21 02:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf9e48303cc2a6c57a5355b7c2203b9a SHA-1: 8f04584f4b38c4dba6bf5c45cbd9b4d336dc3d9e SHA-256: fb8bb63d036f93fe0d05006d06d5235ae1f3db0fa3861971e3956f3b7e8f68b2
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The primary malicious URL identified is `https://ttraff.com/pify?keyword=aithey+aa+lyrics+song`. This indicates the PDF is designed to lure users into clicking malicious links, likely for phishing or to download further malware. The ML classifier strongly supports the malicious nature of this PDF.

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=aithey+aa+lyrics+song
    • http://files.polepressuretexas.com/uploads/1/3/1/4/131454916/9a27e285.pdf
    • http://xeguwe.secretrootsllc.com/uploads/1/3/0/8/130874435/kodujuxeben.pdf
    • http://files.pptf.ca/uploads/1/3/1/3/131398046/31925bf.pdf
    • http://jarefep.pinsnpotions.com.au/uploads/1/3/1/3/131379732/namuwisifejin.pdf
    • http://vesazali.magicalmatthew.com/uploads/1/3/0/7/130776885/gepogenanapesoxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9018/1286/files/15774581414.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/jimota.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/a_user_s_guide_to_the_brain.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdf
    • https://cdn.shopify.com/s/files/1/0432/6824/3624/files/les_choristes_violin_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/gujifejolaxuruz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1644/files/32568418129.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/61238154195.pdf
    • https://cdn.shopify.com/s/files/1/0432/5366/1858/files/briggs_and_straton_boat_motor.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4076/files/actuarial_mathematics_for_life_contingent_risks_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2771/8567/files/fijilesakawek.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_off00005b61.bin
fa1b342f9848917589b1f755afe449f9316cee300797609f624bc49b9f5ebc7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B61 5152 bytes
font_01_sfnt_off00006ce6.bin
f137fdee8ac2b66d06b67b1a716cf688eb7c2cff76c58b3c7c8d2ca36c54d45d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE6 10876 bytes