Malicious PDF — malware analysis report

Static analysis result for SHA-256 22160e9956eaf149…

MALICIOUS

PDF

46.8 KB Created: 2020-08-29 06:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e21697c827ad724c59ba9021a166721a SHA-1: 5d8960b0d255c624a7372aea26baf94d9f2c408d SHA-256: 22160e9956eaf1495ee69af91fa197b633af66fdab71855bb6434468282a8e17
130 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which are disguised as educational resources. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to lure victims with search engine optimized content. The document body also contains the malicious URL, reinforcing the lure. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link embedded within a seemingly benign document.

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/wix?keyword=english+grammar+book+in+hindi+pdf+file
    • https://cdn.shopify.com/s/files/1/0434/5993/6421/files/77472145633.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9768/files/psychology_books_in_urdu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/mewafapovezigopodop.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8474/files/cross_hair_png.pdf
    • https://cdn.shopify.com/s/files/1/0434/4014/4534/files/windows_7_ultimate_iso_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6336/9125/files/fikin.pdf
    • https://cdn.shopify.com/s/files/1/0435/1619/9064/files/xopapi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4261/9035/files/fovata.pdf
    • https://cdn.shopify.com/s/files/1/0432/0277/3156/files/zofelewinerasezu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/phenylketonuria_pku.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/wukolibon.pdf
    • https://cdn.shopify.com/s/files/1/0429/0245/4428/files/83765897966.pdf
    • https://cdn.shopify.com/s/files/1/0438/0891/5613/files/zidedijivake.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/plano_cercanias_barcelona.pdf
    • https://cdn.shopify.com/s/files/1/0431/9336/8725/files/73544445666.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/malayalam_movies_2015.pdf
    • https://cdn.shopify.com/s/files/1/0428/3006/9927/files/74130336564.pdf
    • https://cdn.shopify.com/s/files/1/0428/9203/4211/files/31357796468.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_off00005cad.bin
1a6d49c25f7cf1e5224f06a4ab9a2044b26c59e2719b65775928f57dfb1a935a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAD 5616 bytes
font_01_sfnt_off00006f94.bin
d030ead8f2cc42e6a6a9482c7b8f58d407e2439450905467f9549ffacb7bf369		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F94 9848 bytes
font_02_sfnt_off00009193.bin
66f0d8c5cbff89533cdd0b3ddcc0261546327d8abbc8a452827d78879c7b2ca2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9193 8660 bytes

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