Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf01db03f022268…

MALICIOUS

PDF

46.4 KB Created: 2020-08-16 23:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ece505e8e468fb6039ab36d27e6abe52 SHA-1: 86cd0f8efed16214edf97c839c3e0723c2a8a91d SHA-256: caf01db03f022268116c97df1cb2651ce62c18a813a7b7cc78c0f7a393975f4d
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a malicious redirector. The ML classifier strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.cc/pify?keyword=sailing+logbook+template, which is likely used to redirect users to a phishing or malware distribution site. The document body, though heavily obfuscated, contains this URL, suggesting it's the intended lure.

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=sailing+logbook+template
    • http://jorobej.thescienceofbreadmaking.com/uploads/1/3/1/8/131857631/2262442.pdf
    • http://wemobo.eutropiatours.com/uploads/1/3/0/7/130775997/651757.pdf
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/63500637329.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/centrales_eolicas.pdf
    • https://cdn.shopify.com/s/files/1/0433/9954/4984/files/bafanaxunaja.pdf
    • https://cdn.shopify.com/s/files/1/0431/6561/4234/files/xenusasim.pdf
    • https://cdn.shopify.com/s/files/1/0433/6189/4565/files/semilorasugefosudiwexo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/zoxomevimosotagulipamumax.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4393/files/daderuga.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/lanisuxoruzen.pdf
    • https://cdn.shopify.com/s/files/1/0436/0539/3570/files/5125797398.pdf
    • https://cdn.shopify.com/s/files/1/0439/0384/4520/files/sovebanedinevopale.pdf
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/34917574596.pdf
    • https://cdn.shopify.com/s/files/1/0432/5883/9198/files/38885722767.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fce.bin
a5a4dcf14d11a23f159786ff20839387338e3c6d9e92ea850604c1dda8be6e29
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCE 5172 bytes
font_01_sfnt_off00008148.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8148 1800 bytes
font_02_sfnt_off000089d6.bin
8497308e67d64036f39b5b13aed6fd1df13d6a6acbd7580766a4ba1005f25dcf
pdf-font-stream PDF embedded font (sfnt) at offset 0x89D6 10092 bytes