Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4127006a27249e6…

MALICIOUS

PDF

46.1 KB Created: 2020-08-25 13:08:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbc60984bb62d414e0d526eedc4b6ad8 SHA-1: a8e3303188b524a568505232554b10ad20b63be6 SHA-256: e4127006a27249e65406d8fca2d9d44c6c9a990793bb0e5bb17c2c0521bc7baa
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. Additionally, it contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm designed to distribute malicious content. The ML classifier also strongly indicated maliciousness. The document body contains the URL 'https://ttraff.com/pify?keyword=cd+ramones+adios+amigos', which is likely the primary malicious redirector.

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=cd+ramones+adios+amigos
    • http://misalinu.americanabytheseashore.com/uploads/1/3/1/4/131482976/3935516.pdf
    • http://files.lcaclassicalhistory.com/uploads/1/3/0/7/130775108/gokirixofadajev-fejigikudu.pdf
    • http://vitotipow.rattlerbands.org/uploads/1/3/2/6/132681218/6155ee6ba144a91.pdf
    • http://files.nationaldebtmgmt.com/uploads/1/3/1/8/131872178/5250665.pdf
    • http://files.lsloan.net/uploads/1/3/1/6/131606619/7249086.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5534/files/rirukoxatedutalesitabe.pdf
    • https://cdn.shopify.com/s/files/1/0447/4827/5863/files/microsoft_word_blank_calendar_template_2019.pdf
    • https://cdn.shopify.com/s/files/1/0434/0016/7589/files/acute_myeloid_leukemia_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4967/files/gifuwatezasu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7198/7098/files/rune_locked_chest_wow.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6279/files/nizap.pdf
    • https://cdn.shopify.com/s/files/1/0436/1004/6621/files/delegation_of_financial_power_rules.pdf
    • https://cdn.shopify.com/s/files/1/0433/8027/7406/files/meranadadedadotisoreneguk.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/android_qr_scanner_front_camera.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/ap_english_literature_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2357/files/20261777034.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_off00007132.bin
802d0ba46dc9181a518deb09f8d075bbfe4191df3e577e276eb6ac1aef7d3f82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7132 5016 bytes
font_01_sfnt_off00008228.bin
128e4f744f38f37bf0b51a5869d25d6ea32f4d84e781ce395350362909547ed4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8228 13068 bytes

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