Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e1b64a6e8912a1…

MALICIOUS

PDF

42.9 KB Created: 2020-08-09 03:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10132ddf5aceb33b97290b0cda2c52a1 SHA-1: 45f0aeea5850b7c774111fe70d5babf5bf12e685 SHA-256: 52e1b64a6e8912a1dcc2a34b3f4f5ef8173c569738016acfb400bdbe40712d81
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 pointing to Shopify domains, which is characteristic of a link farm used for SEO manipulation or to host malicious content. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.ru/pify?keyword=cash+flow+budget+example+pdf`. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack pattern involves redirecting users to potentially harmful external 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=cash+flow+budget+example+pdf
    • http://files.rtemusic.org/uploads/1/3/0/7/130739776/08b3951dd35796.pdf
    • http://files.riversideministries.com/uploads/1/3/1/4/131453982/tukobi.pdf
    • http://files.earlbyrdthethird.com/uploads/1/3/0/7/130775252/danidabovebo_rejawinewidup_dubisa.pdf
    • http://files.career-readiness.com/uploads/1/3/0/7/130740260/72713a20a2.pdf
    • http://xomegiko.jbhealth.co.uk/uploads/1/3/1/6/131636612/643928.pdf
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/best_in_slot_rogue_classic.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/nts_analytical_reasoning_questions_and_answers_with_explanation.pdf
    • https://cdn.shopify.com/s/files/1/0438/8637/9160/files/zitegi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/werejuje.pdf
    • https://cdn.shopify.com/s/files/1/0429/4026/8711/files/wifojogewaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/fawoxifuvokikavumitazal.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/sobaviwarumegukidij.pdf
    • https://cdn.shopify.com/s/files/1/0451/2792/5925/files/college_board_sat_practice_test_3.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/65919670688.pdf
    • https://cdn.shopify.com/s/files/1/0437/3174/6967/files/jedekorobemudorakepupatox.pdf
    • https://cdn.shopify.com/s/files/1/0432/7273/2836/files/how_to_reduce_file_size_in_illustrator_cs5.pdf
    • https://cdn.shopify.com/s/files/1/0438/1917/2000/files/33584555634.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_off00006982.bin
c0f6428ef5fca9a90491943540cbcbb53e2f96af5083593a488ed524313bd953		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6982 5564 bytes
font_01_sfnt_off00007c5b.bin
c70f9008c2425599d0b90ef65d6ee87851b04fb8503af4f604a93030667791d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5B 10016 bytes

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