Malicious PDF — malware analysis report

Static analysis result for SHA-256 a86ba3dc87e0f34c…

MALICIOUS

PDF

45.7 KB Created: 2020-08-04 01:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 492bd2519abe7ca368cb00c010d28c8a SHA-1: f96346192b9a6f684250d76536432fe7a3ce717f SHA-256: a86ba3dc87e0f34c4dbde479120dcb91649326968aa86a30264a3f98549c821a
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 pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a title suggesting an academic paper, likely a lure for SEO poisoning or phishing. The presence of numerous links and the redirector indicate an attempt to drive traffic to malicious infrastructure.

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=barabasi+albert+laszlo+a+kepler+pdf
    • http://files.trojerestaurant.com/uploads/1/3/0/7/130775145/vekevelis_lavinebosi.pdf
    • http://files.robbiehamblin.com/uploads/1/3/1/4/131454034/fumugemamevonaxafep.pdf
    • http://files.planthealthcare-mortonarb.org/uploads/1/3/1/3/131383342/jowegobuk-xujeligulelogam-fifexivimi-zapizak.pdf
    • http://files.ellingwoodsoap.com/uploads/1/3/2/6/132696060/3776915.pdf
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/bajupawakimozojosesa.pdf
    • https://cdn.shopify.com/s/files/1/0436/4160/2208/files/bagesaxorofixewasoges.pdf
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/burewarunexesuzuz.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/xagerevuzenurukova.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4179/files/r_sort_dataframe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/world_builder_s_guidebook.pdf
    • https://cdn.shopify.com/s/files/1/0432/9124/6747/files/93507554893.pdf
    • https://cdn.shopify.com/s/files/1/0436/2177/7570/files/ganovenigelesexonu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2483/4975/files/juwojejarakaxafiji.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/75825236868.pdf
    • https://cdn.shopify.com/s/files/1/0431/1705/2066/files/mevumebuduratabilolowok.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_off00007392.bin
8c138285674fa84e666b122c91e9a46d26428017fd61e55476195b37245c83e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7392 5340 bytes
font_01_sfnt_off000085cc.bin
42b99d8ac45a8590b2774c9260d7042f9f5d78261fb08518bd19b0376f215bbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85CC 10024 bytes

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