Malicious PDF — malware analysis report

Static analysis result for SHA-256 4382191f22b48481…

MALICIOUS

PDF

41.5 KB Created: 2020-08-31 13:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 285ae7216cb943602d6fcbe2b9b1e2a9 SHA-1: 02b6b26ea675c39f978ce75cf9c8f3ff4c3faac2 SHA-256: 4382191f22b4848117b04972e5b30c1e770d5afe41924fc67552aede33616b1f
154 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document also hosts a large number of other PDF files on Shopify, potentially as part of a link farm or to appear legitimate. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the presence of the malicious redirector and the link farm suggests a phishing or social engineering attack.

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/wix?keyword=panaderia+monterrey+memphis+tn
    • https://cdn.shopify.com/s/files/1/0434/8998/4674/files/chipotle_catering_prices.pdf
    • https://cdn.shopify.com/s/files/1/0429/2267/2284/files/wuguxelanufeli.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/dejoremi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/gomikufukifotifuvu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sazofafusogowo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/jajafojekoguzebebaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gamefidijuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3133/files/job_offer_letter_example.pdf
    • https://cdn.shopify.com/s/files/1/0428/5644/8167/files/kuwukawotejitobo.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/28924901054.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9673/files/jowugibulugileguri.pdf
    • https://static.usrfiles.com/ugd/09273f_6dd1ee68f6c3428196826d56d4d88be3.pdf
    • https://static.usrfiles.com/ugd/d2751c_8261b2ccf00243b2bea1557e5b19d79c.pdf
    • https://static.usrfiles.com/ugd/8b9728_e5e713bac7664ed298f1d7f5f634ddc4.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_off000063a4.bin
f2ec07133eabaad996eafc8c8d81f9c6ea22238d649ead28564e3b3decfca7e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A4 5272 bytes
font_01_sfnt_off00007568.bin
e64925a5ce6e23efbc195ff8df779f5bd19820a7dd5332b0499b07a900f6bf4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7568 10620 bytes