Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b768190291c13b…

MALICIOUS

PDF

60.7 KB Created: 2020-08-05 00:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 345114c17ce8b12631f05006a22785d2 SHA-1: e681ac08ffb0b483dd6c5f12b61a1b44e63e3468 SHA-256: d2b768190291c13bc13b222d363011049dcfb79cb60b64fecde410b06cfee996
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=coal+beneficiation+process+pdf', which is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or credential harvesting.

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=coal+beneficiation+process+pdf
    • http://files.nightwatchparanormal.com/uploads/1/3/1/4/131407233/de2a968a2a.pdf
    • http://files.fergusonrv.com/uploads/1/3/1/4/131484395/2636239.pdf
    • http://files.debraheschl.com/uploads/1/3/0/7/130775639/1503966.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9576/files/6756803286.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/all_dnd_classes.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7734/files/microsoft_employee_discount.pdf
    • https://cdn.shopify.com/s/files/1/0435/5915/7921/files/25458573029.pdf
    • https://cdn.shopify.com/s/files/1/0430/8572/5857/files/form_966_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/dapalesovefajobasok.pdf
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/92528052438.pdf
    • https://cdn.shopify.com/s/files/1/0431/8897/7813/files/zakokalawutur.pdf
    • https://cdn.shopify.com/s/files/1/0438/0088/7456/files/94483726397.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/89632106962.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/mafaxonupuja.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/71021554427.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_off0000a244.bin
f96c19caa1397f6bfa7eaae3ac5a0745f2210a35f20256b04eac110c125f9702		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA244 5100 bytes
font_01_sfnt_off0000b39e.bin
187a23e98dedec5acebd82694c74a862121e27ad51afb2559baa78fef042c369		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB39E 10568 bytes
font_02_sfnt_off0000d77e.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD77E 4324 bytes

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