Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f4f8b2abc266f6…

MALICIOUS

PDF

42.7 KB Created: 2020-08-19 15:38:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c931316c7caf619a875629aa1e8d620 SHA-1: 6264746a3695620fb74610c9f99b5366d084c271 SHA-256: 31f4f8b2abc266f6ded7062a87c8304f8a41a39fbb4e7ad2aa959631f0cdfb43
120 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the primary malicious URL. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure, likely as a lure for further compromise.

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.ru/pify?keyword=chubby+cheeks+dimple+chin+rhymes
    • http://fodinizom.industryumc.org/uploads/1/3/0/8/130814328/178e2b029371d.pdf
    • https://cdn.shopify.com/s/files/1/0432/0280/5921/files/lanisadewunaduxuxuwabupur.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1138/files/dnd_dci_number.pdf
    • https://cdn.shopify.com/s/files/1/0429/3709/0211/files/74590252275.pdf
    • https://cdn.shopify.com/s/files/1/0433/6327/0815/files/vabirexafazotuzavujefema.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/is_hell_endothermic_or_exothermic.pdf
    • https://cdn.shopify.com/s/files/1/0438/4669/7122/files/fundamentals_of_electrical_engineering_alexander.pdf
    • https://cdn.shopify.com/s/files/1/0437/3728/4762/files/53258555077.pdf
    • https://cdn.shopify.com/s/files/1/0446/5518/1987/files/97597227501.pdf
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/86841295516.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3574/files/bblsr_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/27200448035.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004601.bin
390c4d8db33cb47eb607548da15218759f082b40291c216ddfb110cb7515b022		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4601 5124 bytes
font_01_sfnt_off00005738.bin
f71e274c401c57ec27e6a32613fe6a3c5221c5f0b3fc71c87ebae98ebe496736		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5738 10344 bytes
font_02_sfnt_off00007ace.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACE 16092 bytes
font_03_sfnt_off00008f96.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F96 4324 bytes

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