Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7619ef7fd9713b…

MALICIOUS

PDF

43.1 KB Created: 2020-08-21 13:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e1966dc68b5691ad1292bd2c16c7e77 SHA-1: 6dc713c04233cf8310e3b4a1c3b8401656cf380a SHA-256: 7b7619ef7fd9713b2690022d8230ad563fdd53596ac8517af09eb0004abfcfde
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=3d+car+tuning+pc'. This indicates the document's primary purpose is to lure users to malicious infrastructure, likely for further exploitation or phishing. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious redirector. 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.cc/pify?keyword=3d+car+tuning+pc
    • http://files.seashedboutique.com/uploads/1/3/0/9/130969673/8800913.pdf
    • http://files.geoib.com/uploads/1/3/0/7/130775432/4ae409c.pdf
    • http://files.intriguetheband.co.uk/uploads/1/3/1/4/131453250/4f5b90a61d2fe99.pdf
    • http://files.digitalxraypros.com/uploads/1/3/0/7/130739578/c6937752684b210.pdf
    • https://cdn.shopify.com/s/files/1/0446/7880/7705/files/int_array_to_string.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/20000332523.pdf
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/chilton_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0450/2369/0916/files/spoken_english_download_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9651/3448/files/dafozadudutukajosab.pdf
    • https://cdn.shopify.com/s/files/1/0430/2202/4867/files/41342237296.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6653/files/dictionnaire_orthophonie.pdf
    • https://cdn.shopify.com/s/files/1/0447/7802/9213/files/zepifegulanib.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/zelizu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2786/4471/files/ankle_fracture_rehab_exercises.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f88.bin
f6e59112a5896a639eef25213eb1fa63c9483291e2dce51a1055d2ff81079a21
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F88 4752 bytes
font_01_sfnt_off00006fa8.bin
091823351dc7aa4a4bbb8c9e240189b05915f30ecfc89b38b81bb9dd822fb417
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA8 10052 bytes
font_02_sfnt_off000091ff.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x91FF 4324 bytes