Malicious PDF — malware analysis report

Static analysis result for SHA-256 aafd39485f29b6d1…

MALICIOUS

PDF

51.2 KB Created: 2020-08-17 11:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 510ebeefcf7c2041b58c4d8cc30d6421 SHA-1: 78dcb3b767bea60fefbe1272f8b86d4f8b184737 SHA-256: aafd39485f29b6d109febd188a816dd13f15735beeb3cb4a8fd2421aef87a009
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing for a PDF link farm. One of the primary URLs, 'https://ttraff.com/pify?keyword=calcium+citrate+dosage+forms+available', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a strategy to distribute or mask malicious content through a link farm.

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=calcium+citrate+dosage+forms+available
    • http://files.loganbrady2019.com/uploads/1/3/0/7/130776230/dewesuzasufeg.pdf
    • http://weduf.okkodohighschool.net/uploads/1/3/2/6/132681670/2d69768b4051.pdf
    • http://files.beyouclothingcollection.com/uploads/1/3/1/3/131380337/7104756.pdf
    • https://cdn.shopify.com/s/files/1/0433/7473/9607/files/1836507298.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3397/files/26291780555.pdf
    • https://cdn.shopify.com/s/files/1/0441/0349/9928/files/66758970297.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vebamuwonodivori.pdf
    • https://cdn.shopify.com/s/files/1/0432/8482/4222/files/55231735961.pdf
    • https://cdn.shopify.com/s/files/1/0435/4008/6935/files/credit_rating_methodology_of_crisil.pdf
    • https://cdn.shopify.com/s/files/1/0437/8607/6309/files/waropikulavejom.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/roberto_cantoral_el_triste.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7637/files/doterra_calmer_blend.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/lakavamimuraronuri.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_off000082ff.bin
d74e497bc057a521af63b7aadbc4729913da76c6a85a76898ef15a2ffd4a225a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82FF 5448 bytes
font_01_sfnt_off00009573.bin
94413d962351b0dba4a1c22187acd4780054099bdf7977ba60625027ba661530		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9573 13608 bytes

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