Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d80cbff56a42f4…

MALICIOUS

PDF

44.1 KB Created: 2020-08-09 06:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1184046289641ea2ed849fb9300980b6 SHA-1: 82dc857861f96b22c6efb846ef9ad4a27ddca4ef SHA-256: d8d80cbff56a42f40bb7c33d2813efe57553879c9c62c15716d1ab4b3455b7fd
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify-hosted PDF files, suggesting a link farm for SEO manipulation or content distribution. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves as the initial stage for delivering further malicious payloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=celsius+to+fahrenheit+table+pdf
    • http://guwelo.columbiayouthsoccerclub.com/uploads/1/3/1/4/131453870/sixewevetimone-maxidige-tibuku-merul.pdf
    • http://files.konjstudio.net/uploads/1/3/1/1/131163867/4041e031091ae.pdf
    • http://nudedawum.fit4lifepilateswellness.com/uploads/1/3/0/9/130969723/wakemugolegos-fanagaxirojo-gukem-mikug.pdf
    • https://cdn.shopify.com/s/files/1/0437/6448/2202/files/57350068456.pdf
    • https://cdn.shopify.com/s/files/1/0430/2172/9955/files/gukakulelofeda.pdf
    • https://cdn.shopify.com/s/files/1/0435/3536/8346/files/xivelutulusopasevopomu.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/anesthesia_made_easy_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7118/4794/files/nowumixozusonizalelixuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/21029971247.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/2431011722.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/plymouth_road_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/7922/8833/files/identify_adverbs_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70934180934.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/podagiwof.pdf
    • https://cdn.shopify.com/s/files/1/0432/9547/3822/files/bapalewazemo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3961/files/serato_scratch_live_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/bapozu.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_off000063d9.bin
973f29282a136934597006e7f0a339b3028c371eb94a1b4c81775eca4c10dc40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D9 5176 bytes
font_01_sfnt_off0000755f.bin
a99b00c5ada9c2fab9d33b0e3685a0d5c69e0d984cde8921ae8da559900877ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x755F 14716 bytes

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