Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff026d35dbedc7b…

MALICIOUS

PDF

39.5 KB Created: 2020-08-20 13:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09da73511511e7066499782475fc02ee SHA-1: be8e0921c2ded3ec3ac09509f0c743d9ee3c5660 SHA-256: dff026d35dbedc7bdd83f3579a1b8ceb2bffd276f4d07bb7e1a8f52dd170995c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lure the user into downloading further malicious content. The PDF also hosts a large number of other PDF files on Shopify domains, potentially as part of a link farm to improve search engine ranking for malicious content. No scripts were extracted, but the presence of the malicious redirector and the link farm strongly suggests a phishing or content-luring attack pattern.

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=vba+date+time+picker+format
    • http://files.lighthousechinooks.com/uploads/1/3/2/6/132681026/ba53ddec3.pdf
    • http://files.thetenminuteactivist.com/uploads/1/3/1/3/131382590/0db8688dac37371.pdf
    • https://cdn.shopify.com/s/files/1/0440/0444/2262/files/sapupesefosumijikasome.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/zifopedafopejukowotagulez.pdf
    • https://cdn.shopify.com/s/files/1/0436/4327/3369/files/limatuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8339/9329/files/rimogijamazuvis.pdf
    • https://cdn.shopify.com/s/files/1/0432/7456/7843/files/pajukadevukurarese.pdf
    • https://cdn.shopify.com/s/files/1/0432/3193/6674/files/92342712009.pdf
    • https://cdn.shopify.com/s/files/1/0435/2271/9912/files/atkins_fisico_quimica_volume_1.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/50_shades_of_grey_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6396/files/havasu_falls_guided_tours_2019.pdf
    • https://cdn.shopify.com/s/files/1/0428/1961/6935/files/77611526669.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_off00005857.bin
35cdf53bc5b1fb2c478ae6f7f9227018017740fabb59f9ed9557d8a14cd5dca0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5857 5260 bytes
font_01_sfnt_off00006a2e.bin
fc0958204c598afcf7cab868e5d6ede70d345c5d9bc49456c0576d00c6cac3d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2E 12296 bytes