Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eeae8c9802620d1…

MALICIOUS

PDF

49.2 KB Created: 2020-08-14 16:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e27aa12eb026ef1d1cea7ba74c7d56c SHA-1: a308502f95db6f2777423659225a3524eb860877 SHA-256: 6eeae8c9802620d17bfa5b22f4fa40c02c3856f04fd583b9df8d38755440b12d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=aerosmith+dream+on+lyrics+pdf`. The document body, though heavily obfuscated, also contains this URL, indicating it is the primary lure. The ML classifier strongly supports the malicious nature of this PDF.

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=aerosmith+dream+on+lyrics+pdf
    • http://files.olympicclassictbirds.com/uploads/1/3/0/7/130775049/lefivunuxojaweg.pdf
    • http://files.srmta-reginabranch.com/uploads/1/3/1/0/131071067/dasex_fasamazut_nixurejejerixa_befigekomabogi.pdf
    • http://files.allinoneentdogservices.com/uploads/1/3/2/6/132681771/lexatasawene_jalokoriva_xodewisosefid_balinirisumuful.pdf
    • http://gepodos.barteeranchllc.com/uploads/1/3/1/3/131384240/1c7d5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/doom_3_absolute_hd.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/merriam_webster_scrabble_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/gesewukip.pdf
    • https://cdn.shopify.com/s/files/1/0437/3797/2897/files/all_company_ceo_name_list_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/42409803471.pdf
    • https://cdn.shopify.com/s/files/1/0433/0278/1083/files/32503084776.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3610/files/29127285427.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6229/files/ndc_engine_bearing_catalogue_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0815/files/habitual_buying_behavior.pdf
    • https://cdn.shopify.com/s/files/1/0428/4458/6140/files/60963261191.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057f8.bin
aa2f79dac774bf97394be3010755d1d79a61409f8026b197d2512f720a79f7f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F8 8832 bytes
font_01_sfnt_off000074df.bin
8329d0fb19e335894ed607694509bd2c4fd71bf2871ef4d4d75d654d6dfba4f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74DF 5272 bytes
font_02_sfnt_off000086a8.bin
aa8f4a05f588401c81f691f107775725e1423ed4f00a4f9d33a99ef653dff8f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86A8 10276 bytes
font_03_sfnt_off0000a991.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA991 4324 bytes

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