Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ce263fc310970c…

MALICIOUS

PDF

46.7 KB Created: 2020-08-11 06:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85303f65becc993d267e624ef4bc96ac SHA-1: f77f8a40350307d183e434f24f8614c8f95a71ac SHA-256: 03ce263fc310970cf59cee4412839a7b3df7232ce8ee404bc8c5b6365aaa79b7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link at 'https://ttraff.cc/pify?keyword=truman+capote+breakfast+at+tiffany+s+pdf' leads to known malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests the document is part of a larger scheme to generate traffic or distribute content via numerous external links. The ML classifier also strongly flagged this PDF as malicious.

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=truman+capote+breakfast+at+tiffany+s+pdf
    • http://files.vickiofficer.us/uploads/1/3/0/7/130775033/8132972.pdf
    • http://files.mylendingleaves.com/uploads/1/3/2/7/132712127/af5141.pdf
    • http://files.kmdnorthbay.ca/uploads/1/3/1/4/131482916/1ccf812e.pdf
    • http://gosomibix.fibromyalgiamadesimple.com/uploads/1/3/1/8/131856177/1526129.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0128/1701/files/65478617923.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/91494072165.pdf
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/wataxulupowok.pdf
    • https://cdn.shopify.com/s/files/1/0431/9127/1586/files/laxisakuvisibevuwix.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/5401577224.pdf
    • https://cdn.shopify.com/s/files/1/0438/2287/4781/files/catholic_mass_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/5286046127.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/wegapozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2368/7067/files/42860915361.pdf
    • https://cdn.shopify.com/s/files/1/0430/8434/9591/files/24104554794.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/34157731756.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_off00007771.bin
c02a93418de3cf2ccca38011f2b5eec67c5cf8e8577860ebfe30e7e844a2f1a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7771 5524 bytes
font_01_sfnt_off00008a1d.bin
73f5b31e9b09fcf58f8adc6165aedd8057a4a230e40b2cffe28983d08a16d6f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1D 10544 bytes