Malicious PDF — malware analysis report

Static analysis result for SHA-256 597f210c5be2a6e3…

MALICIOUS

PDF

46.0 KB Created: 2020-08-03 19:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf3b486410d55a7cf0d57b585d629e10 SHA-1: 4142157b872ee2a4b7b3de0e85fa48abd0c5e513 SHA-256: 597f210c5be2a6e3b088b48d6b4fb50baf33c53a779abf62ed704de9dd34990b
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a direct link to known malicious redirector infrastructure at ttraff.ru. The document body, though heavily obfuscated, contains the same URL, suggesting the primary purpose is to lure users to malicious sites.

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=artificial+intelligence+and+the+future+of+warfare+pdf
    • http://files.yachtrock.biz/uploads/1/3/0/8/130874304/8c4b1bb43d7.pdf
    • http://files.theflightproject.org/uploads/1/3/0/7/130775633/dedivapunexafeb.pdf
    • http://files.stockela.com/uploads/1/3/0/7/130739142/228be342c95e.pdf
    • http://files.dressingangels.org/uploads/1/3/1/4/131406544/fatato.pdf
    • http://files.brittanysoriano.com/uploads/1/3/0/9/130969300/xidiwomejugu-dabes.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/botrytis_cinerea_life_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0429/3197/8403/files/34445649799.pdf
    • https://cdn.shopify.com/s/files/1/0429/5072/1699/files/41681389508.pdf
    • https://cdn.shopify.com/s/files/1/0433/8427/5100/files/rarukafawaninotikimipifi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6960/4001/files/94362611060.pdf
    • https://cdn.shopify.com/s/files/1/0438/2621/7120/files/ohio_department_of_education_report_cards.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/underworld_meg_cabot_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6056/files/22248591640.pdf
    • https://cdn.shopify.com/s/files/1/0435/8314/4093/files/pumatafaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0036/files/25989086110.pdf
    • https://cdn.shopify.com/s/files/1/0434/4178/2946/files/65679919310.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6607/files/9193284804.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/muduxalorebunawurimab.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000770a.bin
abe5554a5bc723e9107ccaaf516c3f290a3865089eea1099c927756e8e48acb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x770A 5320 bytes
font_01_sfnt_off0000892b.bin
eb89bf520d373e13bf83b302fb6e63f82bf47f98cd26b05f01f7f2a4bbaa458a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x892B 9712 bytes

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