Malicious PDF — malware analysis report

Static analysis result for SHA-256 6feba25b090fc844…

MALICIOUS

PDF

35.2 KB Created: 2020-08-20 05:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fc2d4488292330e65b95d1596df3c57 SHA-1: cc512c8e0c7ffc57093eac89f3991be5f2b54f92 SHA-256: 6feba25b090fc844299f5e49790569b5829422f4fd0e2cc412fc2d9681952421
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a critical redirector link to 'ttraff.ru', suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, includes the malicious URL and references to a size guide, likely a lure. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded URLs points to a link farm strategy.

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.ru/pify?keyword=elasticated+tubular+bandage+size+guide
    • http://files.justacatlover.com/uploads/1/3/0/9/130969428/purelarega.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4541/2261/files/95139718882.pdf
    • https://cdn.shopify.com/s/files/1/0439/2953/4632/files/8269227967.pdf
    • https://cdn.shopify.com/s/files/1/0431/6764/5852/files/amelie_poulain_valse_piano.pdf
    • https://cdn.shopify.com/s/files/1/0432/9553/9368/files/difference_between_nsdl_and_cdsl.pdf
    • https://cdn.shopify.com/s/files/1/0433/2689/8344/files/28380351908.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/porizigafopos.pdf
    • https://cdn.shopify.com/s/files/1/0438/2274/3712/files/android_accelerometer_sensor_permission.pdf
    • https://cdn.shopify.com/s/files/1/0435/6361/4369/files/lemukidulibivojasawawew.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/wesepikezetuwubupawexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8164/files/modern_cv_template_word_free_._docx.pdf
    • https://cdn.shopify.com/s/files/1/0427/7790/3263/files/mmoire_agronomie.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3764/files/youtube_to_mp3_no_limit.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_off00004cb0.bin
dfc8f7143073ef4a198426a14a0659a3353e762bb59be7f6d16e7b23a0848fa5
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB0 5252 bytes
font_01_sfnt_off00005e8e.bin
fc13d8f3074c5232cddc278532ff9a00ec40becc122c3ff400c0ebd14d0a908b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8E 9816 bytes