Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ababd41868e439…

MALICIOUS

PDF

44.1 KB Created: 2020-07-26 23:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96ade1679ce0e953c81d5d8f4b7ffa05 SHA-1: f71f2e7322c69086777753cf483ef4ccff75f650 SHA-256: 74ababd41868e439528a07e754a7bf91296e9f12c1eb87a9543d801c25864266
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=lightroom+presets+apk'. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the malicious destination. 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=lightroom+presets+apk
    • http://files.hypca.com/uploads/1/3/0/7/130739366/2241373.pdf
    • http://files.theissuenewsletter.com/uploads/1/3/0/8/130873944/facd7fa.pdf
    • http://files.talentstor.com/uploads/1/3/1/4/131453288/dawaredapuxixar_donefebeneka_fudepebiforuw_kekuv.pdf
    • http://files.lavernesartpotfolio.com/uploads/1/3/2/6/132681664/xatonigevonu-laxogu-wadedogelowaxi.pdf
    • http://files.missouriinstituteofhypnotherapy.com/uploads/1/3/2/6/132695543/8275253.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7242/9980/files/26464497248.pdf
    • https://cdn.shopify.com/s/files/1/0432/1997/6350/files/petewanaxapupazafot.pdf
    • https://cdn.shopify.com/s/files/1/0432/0490/3069/files/16331482116.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/33841680426.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/44747863638.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2255/files/80769514089.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/70299782974.pdf
    • https://cdn.shopify.com/s/files/1/0437/5409/4743/files/22007457236.pdf
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/58802186279.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_off00006d31.bin
19454dd060c4223333a4161aa4c975fc29db730a32f633fa361d76a434f7a735
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D31 4888 bytes
font_01_sfnt_off00007dd4.bin
90981464c3224da77023e7e28ae06f24b0bdfa850c132eca8de576bbdfdc8794
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD4 11960 bytes