Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc77c5b3268e51a…

MALICIOUS

PDF

41.6 KB Created: 2020-08-21 02:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 589da05c1c87cb831d7c6f403350d42f SHA-1: 39ab35bbee0236c54da17456fa8093a1c057be85 SHA-256: 5cc77c5b3268e51aefa20a144320905b16c0aaf2ea139e9c0f858987a9a94fb4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links, including a primary malicious redirector at 'https://ttraff.ru/pify?keyword=akinator+app+free'. The document body, though heavily obfuscated, suggests a lure for a free application download, likely to trick users into visiting the malicious link. The ML classifier strongly indicated maliciousness, and the presence of a redirector link points to a phishing or scam attempt.

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=akinator+app+free
    • http://files.prideofpa.com/uploads/1/3/2/3/132303410/7575708.pdf
    • http://files.unionchapelfwb.com/uploads/1/3/0/8/130814351/3050103.pdf
    • http://files.mischiefandmayhemcentral.ca/uploads/1/3/2/8/132814305/a06572cf43b00.pdf
    • http://zegox.averagemanoncampus.com/uploads/1/3/2/6/132695278/zukapugufi_regutupomasof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9232/8104/files/rebojunaxojimaner.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/vonarekiniluxeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/2769/2695/files/jalutazox.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/12316815164.pdf
    • https://cdn.shopify.com/s/files/1/0463/2585/8459/files/nipuzerenoxemojeliborexus.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/duguxizirunobumajofe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8947/7273/files/94597952611.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/9607678182.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/misery_loves_company_meme.pdf
    • https://cdn.shopify.com/s/files/1/0435/0142/0696/files/jepoborofezekekosak.pdf
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/cisco_webex_room_kit_plus_software.pdf
    • https://cdn.shopify.com/s/files/1/0431/5483/3557/files/15992882924.pdf
    • https://cdn.shopify.com/s/files/1/0459/8677/5197/files/coreldraw_x8_trial_version_free.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006633.bin
918341e03a0bad66fefae9e156bbd9224870d6d2517c163c01770eed58a1068c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6633 4736 bytes
font_01_sfnt_off00007662.bin
0a0ed1fe8cceb39f016c4923640a8851a1934924aef57818250f4f3b4d9c0cc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7662 10164 bytes

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