Malicious PDF — malware analysis report

Static analysis result for SHA-256 7567ffcabd697f76…

MALICIOUS

PDF

48.4 KB Created: 2020-08-20 09:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f668829ace8ea6e927e2d747eff57764 SHA-1: 9e44f4dd662bc279b5c1ca1c3621f023c8cdc164 SHA-256: 7567ffcabd697f76554588d708990f1c126eae677d76f84e56e5b9db3f76cd38
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=azur+lane+beginner+guide+2019', which is also listed as a malicious redirector. The presence of a large link farm suggests an attempt to distribute malicious content or engage in SEO poisoning. No scripts were extracted from this sample.

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=azur+lane+beginner+guide+2019
    • http://gikugukem.cobbosseeconteesnowmobileclub.com/uploads/1/3/0/9/130969521/6c423cf50a18a.pdf
    • http://files.digitalcolmer.com/uploads/1/3/1/4/131454090/2210644.pdf
    • http://teleki.bedfordbiblechurch.com/uploads/1/3/1/8/131857252/ea8b0.pdf
    • http://files.3gsstaystrong.com/uploads/1/3/2/7/132712451/nufutelupexaz.pdf
    • http://files.apparelfromhazy.com/uploads/1/3/0/9/130969926/temaxixasojipak.pdf
    • https://cdn.shopify.com/s/files/1/0432/5539/8563/files/jadebawujimizebetawonilux.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/flight_of_bumblebee_piano.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/69119231350.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/cracker_barrel_employee_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/86280843895.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/wexomojipa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/92602234700.pdf
    • https://cdn.shopify.com/s/files/1/0430/4424/1562/files/41630769092.pdf
    • https://cdn.shopify.com/s/files/1/0433/3371/4070/files/bengali_movie_arshinagar_full_hd.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_off00007f0f.bin
55802179f1911193767de70270f069af4a06fc764c52f99b9ca4b15c424e05b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0F 5476 bytes
font_01_sfnt_off000091c3.bin
d1e36c1875bbc84c5a111991705dade96fdee01f67e85c0011bced989100e520
pdf-font-stream PDF embedded font (sfnt) at offset 0x91C3 10356 bytes