Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f9183a603c4e5eb…

MALICIOUS

PDF

46.6 KB Created: 2020-08-08 18:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3130ccf490da07d022474c3e7cec5c97 SHA-1: 98c9864466b8b1ec719a13989dffdfa19643b457 SHA-256: 2f9183a603c4e5ebb2368394014330bf26352b1d7f05eff92af3158e718bebca
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. This URL is embedded within the document body, suggesting a social engineering lure for users to download content. The presence of numerous other embedded links, many hosted on Shopify, further indicates a link farm or SEO poisoning attempt to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=carl+jung+el+libro+rojo+pdf+gratis
    • http://files.inezknows.net/uploads/1/3/2/3/132302939/e63a432783d.pdf
    • http://files.yakimatietonirrigation.com/uploads/1/3/0/8/130813650/d6b368e12.pdf
    • http://files.ororossodelmonferrato.com/uploads/1/3/1/4/131406182/latodapata.pdf
    • http://files.unityofpalmyra.org/uploads/1/3/0/7/130775827/0d2098eedc2.pdf
    • https://cdn.shopify.com/s/files/1/0430/5541/5445/files/gizufusejofaxas.pdf
    • https://cdn.shopify.com/s/files/1/0431/2462/1473/files/45252162303.pdf
    • https://cdn.shopify.com/s/files/1/0445/4167/3636/files/waves_central_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5979/files/fodogefivowetuxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0619/files/create_bookmark_in_from_word.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/nafagipo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1634/7035/files/causes_of_air_pollution_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/34840101507.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/xamakukaba.pdf
    • https://cdn.shopify.com/s/files/1/0446/6681/4617/files/ncert_english_grammar_book_for_class_12_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/wiwutuzivexemekanudanip.pdf
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/zenamuwupixadixe.pdf
    • https://cdn.shopify.com/s/files/1/0447/8897/3729/files/centrifugal_fan.pdf
    • https://cdn.shopify.com/s/files/1/0436/4392/8726/files/dolotirijubefi.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_off000075c1.bin
2267dd74d3b86fe10e6075cdb411b7d62569e72944df853b546fe8238bcfe233		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C1 5328 bytes
font_01_sfnt_off000087ed.bin
a54787bd0f291b8fa1a4afcff74cdefabc70aed5690d5058bca91f1343ec134d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87ED 10792 bytes

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