Malicious PDF — malware analysis report

Static analysis result for SHA-256 318661a186db610c…

MALICIOUS

PDF

39.9 KB Created: 2020-07-31 08:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92d40ab5dfcf5c252246e6a01df59a85 SHA-1: 6a72e8732ed29920589d834c0d667d3cf61eeafd SHA-256: 318661a186db610c3e7f3eb8ee46c1568b968ebfb5940799b2c44f96cfa6f006
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to a known malicious redirector. Additionally, PDF_SEO_LINK_FARM indicates a mass of external PDF links, likely for SEO manipulation or to host further malicious content. The primary malicious IOC is the redirector URL, which is designed to lead users to potentially harmful 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.com/pify?keyword=design+calculation+of+piston+pdf
    • http://files.ashliebailey.info/uploads/1/3/0/8/130815014/lozogagunubalix-ziwokulopute-gejinemitam.pdf
    • http://files.norawickman.com/uploads/1/3/1/4/131407705/kevud.pdf
    • http://files.haggartbelting.com/uploads/1/3/1/4/131438190/3724203.pdf
    • http://files.haggartbelting.com/uploads/1/3/1/4/131438190/
    • https://cdn.shopify.com/s/files/1/0431/8792/9245/files/fexululovejogepak.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4181/files/19426738645.pdf
    • https://cdn.shopify.com/s/files/1/0433/5370/2550/files/81135599809.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/80255372680.pdf
    • https://cdn.shopify.com/s/files/1/0435/4038/1855/files/jujulamukeribebinek.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/68704764304.pdf
    • https://cdn.shopify.com/s/files/1/0437/2316/1768/files/sinubufevav.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0721/files/62450580774.pdf
    • https://cdn.shopify.com/s/files/1/0435/5106/4228/files/xeguwalofijifudufo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/pajom.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1421/files/sepisetulopetuzepu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/62111040054.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_off00005f1e.bin
259d4261608f3185166e134b6b08d1acc6808a3956772f444b64fb356441bd03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1E 5108 bytes
font_01_sfnt_off00007091.bin
9be29324f10a4cffceee044f45b412dca42700cc89212e799d5046142379e8df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7091 9940 bytes

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