Malicious PDF — malware analysis report

Static analysis result for SHA-256 a69d6bb3dd0a4260…

MALICIOUS

PDF

34.4 KB Created: 2020-08-23 08:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d119a25135a8f227e486ef8f54708e48 SHA-1: 8fd097b1c7b8a2551f1c7e76465b07dc1b10032e SHA-256: a69d6bb3dd0a42602b9751f4f1b695e10827d466abc8a91f04d82adaf5d82fb7
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=first+rank+raju+kannada+movie++free`. This URL is presented within the document body, disguised as a movie download link, indicating a likely phishing or scam attempt. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm used to obscure the malicious destination.

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=first+rank+raju+kannada+movie++free
    • http://womoba.yangoninternationalchurch.org/uploads/1/3/2/7/132710712/dafe4919087b23.pdf
    • http://files.hilliardacupuncture.com/uploads/1/3/1/6/131607522/vinelokexilu.pdf
    • http://files.texasdas.org/uploads/1/3/0/8/130874058/3d39d42.pdf
    • http://files.onthewayotw.com/uploads/1/3/0/9/130969357/9996676.pdf
    • http://febubadek.deargodwhyussports.com/uploads/1/3/0/7/130775710/faa3988b5ffa013.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/79101675423.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/52788884046.pdf
    • https://cdn.shopify.com/s/files/1/0430/6875/2023/files/jokavedanobumirubo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/rudenoxefonibafiweranetam.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8454/files/judofokezamemuxotev.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/the_abominable_bride_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4183/files/vitedolikojedegiworo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5393/2966/files/26483982325.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_off0000477d.bin
58fb25856cd6ce57ce999ab1c2abe1e9d3cfc771e8402c042c8df2bfcf6467f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x477D 5176 bytes
font_01_sfnt_off0000590f.bin
cc7029754f07cd6aa563cd62befb99f2ee7f30f9827d722e96fb812a7a049ccb
pdf-font-stream PDF embedded font (sfnt) at offset 0x590F 10552 bytes