Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76d18af47d135b2…

MALICIOUS

PDF

49.1 KB Created: 2020-08-12 12:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abc4d39c9613a8d754df293a2a48bf9d SHA-1: f8a33d24fb72a474ba1b99e386fcfc4ba8362619 SHA-256: c76d18af47d135b2813871f12360f18c8a520ac05a19b50c24a5bd6bf641d30c
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=the+pavement+bookworm+pdf'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL. The presence of a 'download button' heuristic suggests a lure to encourage user interaction with the malicious link.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=the+pavement+bookworm+pdf
    • http://files.techniquejobs.com/uploads/1/3/1/4/131482975/toxemoxuwera.pdf
    • http://files.dogscantflush.org/uploads/1/3/1/6/131606325/zamubal_jisumadilewit_rebopurupej_zivipoluve.pdf
    • http://files.pcrws.com/uploads/1/3/1/4/131406947/5654271.pdf
    • http://files.renditionsfurniture.com/uploads/1/3/1/3/131381542/kixik.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/fopukokomajujasevuded.pdf
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/16383154737.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/important_days_list_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/5100/5590/files/effective_academic_writing_1_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/zujevakena.pdf
    • https://cdn.shopify.com/s/files/1/0437/4865/5265/files/fozixukibi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5653/7493/files/yazaki_cable_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/gowukukazijib.pdf
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/xitoliwakunawiminixuzeti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/68942128587.pdf
    • https://cdn.shopify.com/s/files/1/0431/4677/2629/files/78610948492.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/27504553347.pdf
    • https://cdn.shopify.com/s/files/1/0428/4874/7676/files/63165928819.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/wodajilazabezelajupunovi.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_off000067fd.bin
f3d63a50cf2dde058733ed20b8b94abfcedf86697f2dc202074a7ac9510298b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67FD 5376 bytes
font_01_sfnt_off00007a34.bin
435d91970d2374bdae1fb33b85c3617dedd99c3b7640fa5d724addb9bddac522		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A34 4700 bytes
font_02_sfnt_off00008927.bin
c5b24bdc7398ef4f7ce3b49aca8b309760b65f3955efe7a03dd03f032c4886ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8927 15116 bytes

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