Malicious PDF — malware analysis report

Static analysis result for SHA-256 08f5ae7199bf77c1…

MALICIOUS

PDF

54.4 KB Created: 2020-07-29 09:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a13e0f2f179fc23150f875d7b810675 SHA-1: 319a3b2526cb4d0fcc68c8c891ac0e278ea0744b SHA-256: 08f5ae7199bf77c123236191e354266be7886f25d2210be46a473eb603ba3ac9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. It also exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The ML classifier strongly indicates maliciousness. The document body is heavily obfuscated and unreadable, preventing a deeper analysis of its specific lure.

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.cc/pify?keyword=ndis+information+linkages+and+capacity+building%2528+ilc%2529
    • http://files.winchestercarpetoutlet.com/uploads/1/3/1/4/131453674/436309.pdf
    • http://files.haexperts.com/uploads/1/3/0/8/130874329/zitawinijizukovu.pdf
    • http://files.stephencallis.org/uploads/1/3/0/8/130815009/puzijili.pdf
    • http://files.devonreidart.com/uploads/1/3/2/7/132740187/sajurotevek-kudoje-pixipuxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0430/6108/4322/files/81008124525.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/ratajegoxoru.pdf
    • https://cdn.shopify.com/s/files/1/0432/0631/2098/files/julagakiro.pdf
    • https://cdn.shopify.com/s/files/1/0438/4981/0080/files/tawovatabujobezuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/vakupidokukuvijakesu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49816413057.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/3174155146.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4870/files/kefinolox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52665001447.pdf
    • https://cdn.shopify.com/s/files/1/0436/9835/6392/files/redanimipevate.pdf
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/gavufovobolepusevedime.pdf
    • https://cdn.shopify.com/s/files/1/0437/7211/7141/files/jujosajufafogixutekixuzuf.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008619.bin
aed0a013883e268dbbdaf9b1356e386c9abc177ea1c988b312a861b2804a0337		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8619 5788 bytes
font_01_sfnt_off000099bf.bin
d8e4b7f44dfb66ea49c7f1cefd345a391fade3fb548cc17de4cdbf151663dabd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99BF 6068 bytes
font_02_sfnt_off0000a970.bin
6bff61b34a265cd77e543596575cd091682114984631d35954ec6719697dc945		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA970 10032 bytes

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