Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c2443fe7a17562a…

MALICIOUS

PDF

50.0 KB Created: 2020-08-01 23:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f37775e39b01a8231667b512dbb40ece SHA-1: 6fc0ae58827fdf137b4ee22e19d225a924bcd2a6 SHA-256: 8c2443fe7a17562a1d77bea0e4f82449ec8d419101841898927e05bd5cc02cae
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=morning+afternoon+evening+night'. This indicates the document's primary purpose is to redirect users to a malicious site. The presence of numerous other external PDF links, many hosted on shopify.com, suggests a link farm or SEO poisoning tactic to increase visibility and lure victims. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=morning+afternoon+evening+night
    • http://files.cojwj.org/uploads/1/3/1/6/131606758/1550840.pdf
    • http://files.thehighground.shop/uploads/1/3/2/3/132303035/nobikesisakavi.pdf
    • http://files.lilswatara.com/uploads/1/3/1/4/131437619/tejilokega.pdf
    • http://files.thunderroadhonda.com/uploads/1/3/2/6/132683330/226132.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1575/files/pawuzus.pdf
    • https://cdn.shopify.com/s/files/1/0430/7533/8391/files/4049193200.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/lakidemolirul.pdf
    • https://cdn.shopify.com/s/files/1/0433/2116/3941/files/novinenenak.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6238/files/bunugidab.pdf
    • https://cdn.shopify.com/s/files/1/0437/7896/5656/files/rusunolugelesajar.pdf
    • https://cdn.shopify.com/s/files/1/0431/8422/6453/files/20131260525.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2584/files/83537836258.pdf
    • https://cdn.shopify.com/s/files/1/0434/1039/1207/files/xixotefavuruwegoxoxilosi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/tovokekajemofogibaxuxasi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7668/8799/files/wuvoli.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2763/files/40893718894.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_off00008646.bin
c0dba233c7c9a61bb71b244ca060c65ca345cee4b3626986c02a129ba2ce41df
pdf-font-stream PDF embedded font (sfnt) at offset 0x8646 4884 bytes
font_01_sfnt_off000096f9.bin
cbfa365363c358298054c8346991e2f50c2aecafef3f08b7b3db93dcae5fe569
pdf-font-stream PDF embedded font (sfnt) at offset 0x96F9 10396 bytes