Malicious PDF — malware analysis report

Static analysis result for SHA-256 4635009e25e54e15…

MALICIOUS

PDF

46.3 KB Created: 2020-08-12 11:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 793d99b3cbff50818c1e687baed9ffc5 SHA-1: 67c7de4b8ea4d0a7fcde2a2f83530146f5ec2875 SHA-256: 4635009e25e54e1547fbfc7b9c5c2ca6e4b235077f8a51032a21bd63463043e8
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=calidad+de+vida+laboral+en+colombia+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the malicious URL and a benign-looking PDF title, suggesting a lure to trick users into clicking the malicious link.

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.cc/pify?keyword=calidad+de+vida+laboral+en+colombia+pdf
    • http://files.jabramowitz.com/uploads/1/3/1/4/131454521/1327124.pdf
    • http://files.ejhe.co.uk/uploads/1/3/0/7/130775834/josepizufojutolupib.pdf
    • http://files.archaeoacousticsscotland.org/uploads/1/3/0/8/130814110/b9660aba.pdf
    • http://files.michaelfoyle.org/uploads/1/3/2/6/132695620/wuwuretorataz-penati-japibe.pdf
    • http://files.cartoon-u.com/uploads/1/3/1/0/131070849/nezofeja.pdf
    • https://cdn.shopify.com/s/files/1/0431/0669/7367/files/kevuki.pdf
    • https://cdn.shopify.com/s/files/1/0429/6962/8828/files/smoldering_blood_hide_dauntless.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/jiwujowolopup.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/zotedak.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6741/files/sufeboros.pdf
    • https://cdn.shopify.com/s/files/1/0438/6911/0432/files/lamuduwoxow.pdf
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/rogunumetegege.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/iterator_java_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2243/files/fogoxevikam.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2150/files/75658117915.pdf
    • https://cdn.shopify.com/s/files/1/0431/9723/5363/files/makutasavolevixibop.pdf
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/bafavokobamajipukeraw.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_off0000734c.bin
2e33c183073e69d718ad891bb92f796e7f37549a3a830bc54a32d2138eca9a57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x734C 5228 bytes
font_01_sfnt_off000084fc.bin
2ad650ace92d923bbe6f68b7c9c3d5a7d7b3ac44f4cee1a2d392cdc5c85b0271		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84FC 11528 bytes

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