Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbae216de5b211e…

MALICIOUS

PDF

36.0 KB Created: 2020-08-17 12:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcc2b426d18aa9c7c0724238efb0c563 SHA-1: 8e7a092c3b2149e03375c975f3c365fe254c7628 SHA-256: 2fbae216de5b211e2292580f3ef5d97ab0d7b05544034ec11208dae388ac7d0a
152 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 hosting other PDFs, suggesting a link farm designed for SEO manipulation or traffic redirection. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the target URL, reinforcing the redirection attempt.

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=endnote+online+library
    • http://kafakofad.themikepetersen.ca/uploads/1/3/0/7/130739536/4038264.pdf
    • http://files.animalecologylab.org/uploads/1/3/1/3/131383655/zuniwasarasu-luzadifi-nenuwor-winug.pdf
    • http://files.tchancellor.com/uploads/1/3/0/8/130874254/528790.pdf
    • http://rafuvu.stgeorgemn.org/uploads/1/3/0/7/130775654/pivatemekutadur-nunufojukib.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/wujinigapukunu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/87955982598.pdf
    • https://cdn.shopify.com/s/files/1/0450/1169/7814/files/tujuan_budaya_organisasi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5174/files/12520214484.pdf
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/gypsy_jazz_guitar_arpeggios.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1566/files/4620905163.pdf
    • https://cdn.shopify.com/s/files/1/0440/4376/3862/files/3867462380.pdf
    • https://cdn.shopify.com/s/files/1/0438/3319/6706/files/bobuxugepuxesemogowebap.pdf
    • https://cdn.shopify.com/s/files/1/0437/0336/9878/files/15391613309.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/12159285088.pdf
    • https://cdn.shopify.com/s/files/1/0429/3374/7878/files/donurozonigozujev.pdf
    • https://cdn.shopify.com/s/files/1/0429/0271/6572/files/band_of_brothers_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/appcompatedittext_android_example.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_off00004f1c.bin
9ddd844a82ca9dc3c7f38a80f9e5bee8fe3186e7aae80f833f63edba60bf8739		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F1C 4840 bytes
font_01_sfnt_off00005fa2.bin
b45a4664b2cd2517101b64b24d0ef4792dfff07da9a1784815082b78126cd32b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA2 9916 bytes

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