Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b6c7a4720977c4f…

MALICIOUS

PDF

48.5 KB Created: 2020-08-25 10:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bd601c8303fb7f2259dfc473db05373 SHA-1: 48c092fbac1507f45f2a7cda03aba0e8d6d3d26c SHA-256: 4b6c7a4720977c4fcfbb3936c30c5fab087764a9b0af9f620414d8bc803f1e22
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains the same URL found in the heuristic, suggesting a lure to a malicious site. The presence of a large number of external PDF links also points to a link farm or redirection scheme.

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.ru/pify?keyword=acknowledgement+for+ojt+narrative+report+pdf
    • http://files.tashstouchgothicclothing.com/uploads/1/3/1/3/131379356/d39df.pdf
    • http://jazelek.seanjmnewman.com/uploads/1/3/0/9/130969933/e3af32.pdf
    • http://files.sivitgear.com/uploads/1/3/0/9/130970003/6856326.pdf
    • https://cdn.shopify.com/s/files/1/0431/4818/1666/files/90851417074.pdf
    • https://cdn.shopify.com/s/files/1/0435/0499/2408/files/mepuxidizujoxokawuputem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6015/8873/files/smoke_effect_background.pdf
    • https://cdn.shopify.com/s/files/1/0429/9964/4314/files/lightroom_5_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7599/files/65124306306.pdf
    • https://cdn.shopify.com/s/files/1/0431/1475/8293/files/61364366366.pdf
    • https://cdn.shopify.com/s/files/1/0427/9926/8003/files/sosamexepebesikuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5144/files/gezogo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2320/files/lehninger_principles_of_biochemistry_solution_manual.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_off000069ed.bin
ba91e40c7ca03ee828324f0a812e2dd673045ec17fe943344c8580d0d27f658f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69ED 5576 bytes
font_01_sfnt_off00007ceb.bin
3afd9134cd64a3c0a4cfd9cc413b8240987fe5ccf8bb86651af6f441056ccff1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEB 10140 bytes
font_02_sfnt_off00009fd5.bin
f0a8b786da721c7415a59d91fbce3b20bbb98ea32e48857ac1ff22d53b00ec29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FD5 16144 bytes

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