Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1268e49204acb17…

MALICIOUS

PDF

46.4 KB Created: 2020-08-05 02:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 378eb55a205ffdf4c9ad1bcf1b15c0a9 SHA-1: 6afbc0d19728285b2969693ad7e9e1c316f87a2a SHA-256: e1268e49204acb1705d80937ceca6e811c7e2e7aa255c6cc02f8dc9d9d4ea89e
152 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 firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=human+anatomy+and+physiology+with+pathophysiology+book+pdf'. The document body, though partially corrupted, also contains this URL, suggesting a lure to a malicious site disguised as a book download. No scripts were extracted from this sample.

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=human+anatomy+and+physiology+with+pathophysiology+book+pdf
    • http://pumadoke.thestitchisbackpdx.com/uploads/1/3/2/6/132695492/wutedokolez.pdf
    • http://xemikub.pigtalerestaurant.com/uploads/1/3/0/8/130814238/9702464.pdf
    • http://files.furrealphilly.com/uploads/1/3/0/8/130873855/ladakugurute-xuxibotuv-zamuwijafim.pdf
    • http://valikede.mirasolphysicalrehab.com/uploads/1/3/0/7/130739678/3363918.pdf
    • https://cdn.shopify.com/s/files/1/0435/8340/6243/files/luvoxowesuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/25951960046.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/vabavaxaxusaselixagife.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/53525729046.pdf
    • https://cdn.shopify.com/s/files/1/0428/9930/8711/files/48082647224.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/1997/files/8616568518.pdf
    • https://cdn.shopify.com/s/files/1/0436/0398/4547/files/avengers_fanfiction_tony_multilingual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6516/files/96418246182.pdf
    • https://cdn.shopify.com/s/files/1/0438/8667/4088/files/cadver_exquisito_agustina_bazterrica.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_off000068fe.bin
ed7eaa086ce081b10b745a9a6678a511952f6e0bb735ba5b321165689790226a
pdf-font-stream PDF embedded font (sfnt) at offset 0x68FE 5480 bytes
font_01_sfnt_off00007b85.bin
4857a22e352edb936d22a2dc0f910292db9b0176c0d9c5c5947820d3cd95f579
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B85 10148 bytes
font_02_sfnt_off00009e42.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E42 4324 bytes