Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b391d4b0c1f70e…

MALICIOUS

PDF

46.2 KB Created: 2020-09-01 19:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53e68fff048d5880cde5019054662267 SHA-1: f19e1535423106449610fe7da6198d2961c45b4c SHA-256: d9b391d4b0c1f70e3841bbc4918380c0dd6c0abd4a49afbc62fd516adf87adee
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/wix?keyword=feedly+api+guide'. This URL is presented within the document body, disguised as a 'feedly api guide', indicating a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, suggesting an attempt to distribute traffic or host further malicious content.

Heuristics 3

  • 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.
  • 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.link/wix?keyword=feedly+api+guide
    • https://static.usrfiles.com/ugd/b8c837_f3b7e6ba1dcd4a3a8e9da07b81913988.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1b6dd5e34a34c318935621fec93e880.pdf
    • https://static.usrfiles.com/ugd/e7e4a0_067120160c4f4be1824a28db55e737a1.pdf
    • https://static.usrfiles.com/ugd/a91264_a22478c0b15340d6bf954382695cb0db.pdf
    • https://static.usrfiles.com/ugd/a59130_495750ccb5ac41d09ad4c8dea39ad1c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c0101b12be4433f90a782b02d807459.pdf
    • https://static.usrfiles.com/ugd/1ee69b_8f28f4517fa64facb534b978c8588740.pdf
    • https://static.usrfiles.com/ugd/89c6ad_39d5a03b985645fa9d021b6c31dbb677.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mitev.pdf
    • https://cdn.shopify.com/s/files/1/0437/6127/0935/files/african_animals_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/fapupeliv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0111/files/ropenimokupinakabo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4344/files/55080075538.pdf
    • https://cdn.shopify.com/s/files/1/0457/7371/7660/files/vishnu_sahasranamam_hindi.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_off00006333.bin
cbfeb786cda9802c84285f13dda4f912abd4bdbc29363fe8e1fe5c41bdda1c56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6333 4496 bytes
font_01_sfnt_off00007288.bin
b5f39eba10cb134a296ba3c1e834bee888616c4bff2eade20113ef3fcfb04e47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7288 14168 bytes
font_02_sfnt_off00009e7a.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E7A 4324 bytes

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