Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4b5ed5f2aec8b1…

MALICIOUS

PDF

47.2 KB Created: 2020-07-25 05:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99960fe26b2dcf1c7c9fb0eaef7e21e1 SHA-1: 6f17c31f0de7c1a4dbfc956a0fd9c4812adda899 SHA-256: 7e4b5ed5f2aec8b1dadf1cc4a18dcc2b31b5ee9844b8663afc4f3f20efd1878c
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous external PDF links, many hosted on cdn.shopify.com. The primary malicious URL identified is ttraff.cc, which is likely used to funnel victims to further malicious content. No scripts were extracted, and the document body was heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=table+of+contents+page+template+word
    • http://files.elegantedetailssalon.net/uploads/1/3/2/3/132302970/rurilativelowo.pdf
    • http://files.cenutrifit.com/uploads/1/3/1/4/131453284/14d47c0a38e0b3.pdf
    • http://files.wectp.org/uploads/1/3/0/7/130775707/zufomif.pdf
    • https://cdn.shopify.com/s/files/1/0433/3492/6495/files/76720513774.pdf
    • https://cdn.shopify.com/s/files/1/0430/8280/9497/files/zoxazigobapapogav.pdf
    • https://cdn.shopify.com/s/files/1/0432/9055/8622/files/26174919347.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/95678847985.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/kedumazojamosamaju.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/moduxabowoza.pdf
    • https://cdn.shopify.com/s/files/1/0431/4526/5312/files/bapivavafal.pdf
    • https://cdn.shopify.com/s/files/1/0432/1614/2497/files/vamuwawutelidegosamajokum.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7130/files/kepavedumidibidu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/31288199250.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tikumakosesik.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/mezepewegodu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.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_off00007abc.bin
9d632c72255838939efdd7cdebdc5b8213ce37c6cbfff4dd4d7f83c9421ec9b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABC 5396 bytes
font_01_sfnt_off00008d0b.bin
3fce15b9095f5b90d241c7a8da22ab665135b6f6fb85d2a27a8182cb57ad05be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0B 10036 bytes

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