Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9c4a1fff8ddc39d…

MALICIOUS

PDF

49.0 KB Created: 2020-07-31 20:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ea4b088e2ab313580752fcf503eb762 SHA-1: bb1caa3c6819a51b2ccc90e133eeacb198d4a845 SHA-256: a9c4a1fff8ddc39d5018714b03cc9e2cde645738c2133caf682ffaa5a4ea212d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. One prominent URL, "https://ttraff.com/pify?keyword=singer+sewing+machine+manual", is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the sewing machine manual lure and the malicious redirector URL, indicating the primary goal is to redirect users to malicious infrastructure.

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.com/pify?keyword=singer+sewing+machine+manual
    • http://files.innovationsbuildingservices.com/uploads/1/3/1/4/131438741/3ca2f8128cf.pdf
    • http://files.travelbyrobins.com/uploads/1/3/0/7/130775076/tutigi.pdf
    • http://files.blacklaceandpearls.com/uploads/1/3/2/6/132696233/4588428.pdf
    • http://files.ciaranculliganphotography.com/uploads/1/3/2/8/132814371/gekodunuvunevaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0349/4043/files/gawepopazetetarawegamu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1927/0301/files/25122414036.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/mipolapinubovedu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4023/files/juvotujavivaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/ribebofapuvigudogobed.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/92318916691.pdf
    • https://cdn.shopify.com/s/files/1/0433/0668/0484/files/18655397162.pdf
    • https://cdn.shopify.com/s/files/1/0430/8579/1393/files/99130619421.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/22116998161.pdf
    • https://cdn.shopify.com/s/files/1/0430/7143/9001/files/gutugebupetamovu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94229011204.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_off00007b6f.bin
e0e49971b0dcf2603f3de9c4cd7b18a47df23e4759a63c5836a50751a9e0200b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6F 5408 bytes
font_01_sfnt_off00008db8.bin
47b318d96de0289eeaa5f36c864d39871abba9d0ae540c77ab68d07dba263cb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB8 13024 bytes

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