Malicious PDF — malware analysis report

Static analysis result for SHA-256 4facff2832b1d483…

MALICIOUS

PDF

38.3 KB Created: 2020-08-09 20:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2586e74aa08b13af053dbb64f08691e5 SHA-1: fcb4896358ea307b1f88240a5344200f9a668561 SHA-256: 4facff2832b1d4833c096979aab58a3c1f7e4903ca375c861fd6b045b49977fd
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a link to a known malicious redirector. It also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is ttraff.cc, which is used to redirect to other content.

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=pronunciation+british+english+pdf
    • http://files.9thwave.net/uploads/1/3/0/9/130969573/pomotojit_lodililenagov_gepaporexag.pdf
    • http://jekakif.northbrightonrecording.co.uk/uploads/1/3/1/4/131437657/xedalemivaka-luloxexonor-zujabefen-zifuwesekunul.pdf
    • http://files.vineyardlifestiles.com/uploads/1/3/1/4/131454523/9698646.pdf
    • http://files.fightnightblog.com/uploads/1/3/2/7/132740778/13615.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/junepovadefeguma.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/67156843968.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bijalikupuxamimidesedol.pdf
    • https://cdn.shopify.com/s/files/1/0435/7183/9135/files/suluxil.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2821/files/32105301941.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/moweludobumopivevu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/lawixizirimaxolaxuvolexi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0133/files/ladidul.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/ooga_chaka_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80884551140.pdf
    • https://cdn.shopify.com/s/files/1/0432/5625/0525/files/the_bulletproof_diet_cooking_methods_roadmap.pdf
    • https://cdn.shopify.com/s/files/1/0432/2459/6642/files/11341230774.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_off0000572e.bin
c68aebbbc62540fb0eb5933c09f361cf96195ae2c2864e6faeb1546f5b3efd1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x572E 5556 bytes
font_01_sfnt_off00006a09.bin
0dd4fe136429c28ce3f2568798e175a95aa0c934c7cda616520c0c6422ffe349
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A09 10088 bytes