Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89a565349f6a0c9…

MALICIOUS

PDF

39.1 KB Created: 2020-08-21 12:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9244888eaf1c2a3c77c2226fabf4e52 SHA-1: fe0ee1b9e8cc8c2214f1248169ae1ab6f02ff751 SHA-256: e89a565349f6a0c9c33a04100ba51d2bc622259f909fd89fa15c19342faa4b17
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'free project action plan template excel' and the malicious URL, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, likely to obscure the malicious redirector. 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=free+project+action+plan+template+excel
    • http://files.eeutah.org/uploads/1/3/1/4/131437276/serovomexepa.pdf
    • http://jaguben.dustinmillergolf.com/uploads/1/3/0/7/130740510/vokivedubidezu.pdf
    • http://romupixo.conciergepainrelief.com/uploads/1/3/1/4/131406515/zomojunurumivo-rigonoliniwar-vinalumog-nesuzevopodirug.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/37842010908.pdf
    • https://cdn.shopify.com/s/files/1/0434/8860/8418/files/25439521696.pdf
    • https://cdn.shopify.com/s/files/1/0432/4275/0114/files/greenback_boogie_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0439/5863/2606/files/lease_agreement_doc.pdf
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/41562409348.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7452/files/rutadosaxudejuzob.pdf
    • https://cdn.shopify.com/s/files/1/0437/0120/7193/files/62095147396.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9973/files/bofub.pdf
    • https://cdn.shopify.com/s/files/1/0435/6322/1155/files/xajunufojugikakapululijik.pdf
    • https://cdn.shopify.com/s/files/1/0437/8460/1758/files/savirerujafududikid.pdf
    • https://cdn.shopify.com/s/files/1/0433/3800/6686/files/govidojenimimosuxagu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/63006958791.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_off00005c88.bin
8ed0862190de5184963e1e0add691f91230d8825c315da36827d7883f1e4ab99
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C88 5000 bytes
font_01_sfnt_off00006d79.bin
3e901cbd0b334abb9c7a6268a9adf2348373b3c2534af83adcb38d4d0a653a22
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D79 9912 bytes