Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f4f26755e4ef73c…

MALICIOUS

PDF

40.4 KB Created: 2020-08-15 07:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f959d55bf7eefb284ffb127c0a51d2a SHA-1: 7d84e50c7f57e6c42be19334d79df9ef5949e546 SHA-256: 3f4f26755e4ef73ca57777b9e357ab962fc80ffaa88383f983cd2094c80019f7
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, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains references to URLs that are part of a link farm. This suggests the primary purpose is to lure users to external sites, potentially for phishing or malware distribution. No scripts were extracted from this sample.

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=carbonless+form+paper
    • http://files.emilyfortinphotography.com/uploads/1/3/1/4/131454270/f49c80.pdf
    • https://cdn.shopify.com/s/files/1/0444/3491/5495/files/83245487566.pdf
    • https://cdn.shopify.com/s/files/1/0437/5881/3341/files/restaurant_business_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/1347/9320/files/xinesozofosoduminubox.pdf
    • https://cdn.shopify.com/s/files/1/0437/5897/7178/files/57887115427.pdf
    • https://cdn.shopify.com/s/files/1/0437/4550/9537/files/light_grey_dye_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0428/5156/5724/files/rugiluxatosa.pdf
    • https://cdn.shopify.com/s/files/1/0437/4206/8887/files/42677195241.pdf
    • https://cdn.shopify.com/s/files/1/0434/6557/2514/files/jefurin.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2512/files/aarti_sangrah_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fikikotiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/6957/0198/files/49444925000.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_off0000625b.bin
e0055249468de7532e735dca914d83b85bf1caf33094be8e921cb86f938ba038		 pdf-font-stream PDF embedded font (sfnt) at offset 0x625B 5092 bytes
font_01_sfnt_off0000738d.bin
dbcfcf4e7831067858c9727f9e1cc6d1680810c008753b01b2aa20d0c89b52d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x738D 10088 bytes

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