Malicious PDF — malware analysis report

Static analysis result for SHA-256 be74f4c05a9d4c6c…

MALICIOUS

PDF

42.2 KB Created: 2020-08-05 00:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7554f187ca7a797ad7f9c8484075e673 SHA-1: c2bc9201e388470065295cd7fc945e926746af0d SHA-256: be74f4c05a9d4c6c1f18259b34b81b0f4d23491c351aff9dd6bfd88f7fc20aac
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). This suggests a link farm used for SEO poisoning to lure victims with seemingly legitimate book titles. The primary malicious URL is a redirector designed to obscure the final destination.

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=mathematics+in+the+modern+world+college+book+pdf
    • http://files.otherrealmstudio.com/uploads/1/3/1/0/131070450/6685519.pdf
    • http://files.fatimaelizabethphrontistery.co.uk/uploads/1/3/1/8/131856602/16a654eb645f2.pdf
    • http://sejilizon.urbanrenewaljazz.com/uploads/1/3/0/9/130969204/fusamar.pdf
    • https://cdn.shopify.com/s/files/1/0433/3977/6159/files/nisosebixipolefosuja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44240048578.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/telexoga.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3820/files/legajanefapirin.pdf
    • https://cdn.shopify.com/s/files/1/0435/7334/6463/files/www._smiledirectclub_checkin.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/sims_2_cc_clothes.pdf
    • https://cdn.shopify.com/s/files/1/0428/6588/5351/files/57259489159.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/nuxapopitaduwenoxin.pdf
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/birmingham_new_street_station_map.pdf
    • https://cdn.shopify.com/s/files/1/0435/8373/3915/files/51400009117.pdf
    • https://cdn.shopify.com/s/files/1/0428/9468/8423/files/bosuvolitegudovuzebumu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/femepotufitaxaturu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3265/7575/files/75142731743.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_off00006472.bin
4d5d5bc1fd958bc7d29f65bacd46196c799d93ff687433928f326fb8822e4603		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6472 5872 bytes
font_01_sfnt_off0000785d.bin
f8e06c598b1a7ce8cc7488f3eb55e45b82b88bee75f5b2514ab30bc4d0ab68ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x785D 9752 bytes

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