Malicious PDF — malware analysis report

Static analysis result for SHA-256 4424d33c959d92ba…

MALICIOUS

PDF

41.6 KB Created: 2020-08-17 14:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cec301384491ecd0b3dd35b840ba290d SHA-1: d6b618628f8473ac01bffc0dcd921112163db992 SHA-256: 4424d33c959d92ba0bccb326dc85050b77d1b610dad8e2ffbf4d8a040082d07a
152 Risk Score

Malware Insights

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

The PDF contains a deceptive lure related to 'Android mobile phone secret codes' and embeds numerous links, including one to a known malicious redirector at 'ttraff.cc'. This redirector likely serves as a gateway to further malicious content or exploits. The ML classifier also strongly indicated maliciousness.

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=android+mobile+phone+secret+codes
    • http://files.gchorns.com/uploads/1/3/0/8/130814177/444e656226.pdf
    • http://files.sunshinecityfilmfestival.com/uploads/1/3/1/8/131871554/wisaxaga-vezopusosivofa-suzusapux.pdf
    • http://gotoroze.tac4usa.com/uploads/1/3/0/8/130874540/wamerejiwewu_jetovokod.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/51261694451.pdf
    • https://cdn.shopify.com/s/files/1/0429/3538/6265/files/pujesugidajosu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4869/files/10847278054.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8274/files/satuke.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/98438390577.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/nancy_drew_curse_of_blackmoor_manor_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/travel_planning_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/fefajogunexowiti.pdf
    • https://cdn.shopify.com/s/files/1/0438/9876/5480/files/departmental_account_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6262/files/60635106342.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/alan_walker_darkside_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/jukugemabakex.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_off00006454.bin
a5bfdd09590ace1fef5dd4af22f2b476d2827094c99eefc245ebd4c3916a53cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6454 5232 bytes
font_01_sfnt_off000075e6.bin
5bd6af456c391779bd91357097d9e1bff4d8e5d7f2126339a9d1dbb5533a51d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x75E6 10372 bytes