Malicious PDF — malware analysis report

Static analysis result for SHA-256 4279c7aa89558d53…

MALICIOUS

PDF

43.7 KB Created: 2020-08-25 14:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f04c585a3ca774a817846345ea66b893 SHA-1: a1a9a55e8582b73d442913539ee439255f9fe5d3 SHA-256: 4279c7aa89558d531b5097235fdaaac3e152f2cc503d8b6fce7369fcdb508797
152 Risk Score

Malware Insights

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

The PDF contains a lure for 'wedding invites templates free' and embeds numerous links, including a critical redirector link to 'ttraff.com'. The ML classifier strongly flagged this PDF as malicious. The document body is heavily obfuscated but contains the redirector URL, indicating a likely phishing or malware distribution 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.com/pify?keyword=wedding+invites+templates+free
    • http://files.josephgoff.com/uploads/1/3/0/8/130814644/ec9bb2b1ad19.pdf
    • http://sesezila.kristinhough.com/uploads/1/3/0/8/130813306/neparet_todok.pdf
    • http://nusudot.reformation.kaisons.org/uploads/1/3/1/3/131398020/2078869.pdf
    • http://files.talkntrot.com/uploads/1/3/0/7/130739154/ridufokogel.pdf
    • http://xitedadas.toddbhudson.com/uploads/1/3/1/8/131856072/b6853168be1f.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/jobab.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6163/files/92187725349.pdf
    • https://cdn.shopify.com/s/files/1/0434/1609/2828/files/xefinakeluvo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8559/4775/files/muwig.pdf
    • https://cdn.shopify.com/s/files/1/0430/5249/9095/files/arabic_french_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0430/9037/8903/files/18856499659.pdf
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/bagesamilotoxinegatijexip.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8885/files/loxufavorajaferut.pdf
    • https://cdn.shopify.com/s/files/1/0435/6849/6798/files/55453654004.pdf
    • https://cdn.shopify.com/s/files/1/0430/8746/2551/files/four_veronica_roth_ebook_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/wexixuvef.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_off00006c73.bin
50c2c1c8fa32b053f7658529d5c2d45d39b2e296b5b7d3b057c515b1939f433c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C73 5436 bytes
font_01_sfnt_off00007ee9.bin
45ab072c85d48f056e7389c5159281362850d71d4a750a2675a319921bf14c71
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE9 10260 bytes