Malicious PDF — malware analysis report

Static analysis result for SHA-256 f162c700769fa3a4…

MALICIOUS

PDF

54.1 KB Created: 2020-08-10 21:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8a472810fa1c1d7d1e815a706f6d087 SHA-1: d64cc84af947c58111ae57a93afcf087d6b68fbf SHA-256: f162c700769fa3a4d640b5b775fe735c810952db33a84e8d918ae821c2a00173
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, and another flagged the document as a link farm. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=biology+ncert+in+gujarati+pdf, which is likely used to redirect users to malicious content. The presence of numerous shopify.com links suggests an attempt to blend malicious links with seemingly benign ones.

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=biology+ncert+in+gujarati+pdf
    • http://files.sarabparks.com/uploads/1/3/1/6/131637385/22b7259635de61.pdf
    • http://wapepedu.unicaninternational.com/uploads/1/3/1/0/131071021/boguranaxopik.pdf
    • http://files.integritypump.com/uploads/1/3/1/3/131384718/jujowo-lifowogoxigex.pdf
    • http://perasetus.randomencounterproductions.com/uploads/1/3/0/7/130775219/8178287.pdf
    • https://cdn.shopify.com/s/files/1/0440/4038/8758/files/39670609827.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/61570678722.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/42563425359.pdf
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/31146279138.pdf
    • https://cdn.shopify.com/s/files/1/0428/4982/9023/files/rewepatunonis.pdf
    • https://cdn.shopify.com/s/files/1/0439/3009/1688/files/apush_textbook_old_amsco.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6348/files/cours_d_anglais_mdical_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0428/4196/4710/files/27771188635.pdf
    • https://cdn.shopify.com/s/files/1/0429/0704/1958/files/wiwozakisumopigisufom.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/57268631060.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/54479113877.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5903401900.pdf
    • https://cdn.shopify.com/s/files/1/0431/7131/5876/files/binomio_de_newton_ejercicios.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_off0000770c.bin
704c1eed751d9eb611ad1ac067173bf3c84ae211e6ef76da742252dcf0597d5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x770C 5372 bytes
font_01_sfnt_off0000896a.bin
ac7fa9ee281a9abf17c9e14917ae01df3af915f5adfa5b184745defb3de5994a
pdf-font-stream PDF embedded font (sfnt) at offset 0x896A 10440 bytes
font_02_sfnt_off0000ad32.bin
ec470fa5bb3a42fcb85964b9e412270ecc226dccbc8c20e9ebd4a74ad346d057
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD32 9532 bytes