Malicious PDF — malware analysis report

Static analysis result for SHA-256 29056819af9fd8b7…

MALICIOUS

PDF

49.2 KB Created: 2020-08-09 15:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36f66bc9823c1d82ea73cdeccb26c403 SHA-1: 279bc552a531d58bff5b662cd6f04cb72761159d SHA-256: 29056819af9fd8b7b3673e6eff2613830d56f91dfd9cae9193db2ef2b1672cd6
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=karakteristik+batuan+beku+pdf'. Another heuristic detected a large number of external PDF links, suggesting an attempt at SEO poisoning or a link farm to distribute malicious content. The document body itself is heavily obfuscated but contains the same redirector URL and numerous other Shopify-hosted PDF links.

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=karakteristik+batuan+beku+pdf
    • http://files.thingsastheyare.co.uk/uploads/1/3/0/9/130969663/8406293.pdf
    • http://files.steveatkinsondesign.com/uploads/1/3/1/3/131379761/c4ddbfb6.pdf
    • http://files.12stepspirituality.org/uploads/1/3/0/7/130739480/waxuxinijas.pdf
    • http://ziriv.ocalaeq.com/uploads/1/3/1/4/131453194/vugefubogemafipevu.pdf
    • http://fivogo.gusandrubys.com/uploads/1/3/0/8/130813765/botapumogu-jisixugofaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/8924265107.pdf
    • https://cdn.shopify.com/s/files/1/0430/8602/0761/files/70252462946.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/atomos_shogun_studio.pdf
    • https://cdn.shopify.com/s/files/1/0437/9066/3832/files/xakegisemeratakiwojowi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/alien_3_william_gibson_script.pdf
    • https://cdn.shopify.com/s/files/1/0447/3470/9914/files/decameron_giovanni_boccaccio.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8903/files/32612905693.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6290/files/journal_ennahar_algerie_aujourd_hui.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/4030269122.pdf
    • https://cdn.shopify.com/s/files/1/0429/1503/7351/files/tiputu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9429/5203/files/delonghi_air_conditioner_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/10064980997.pdf
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/38359220880.pdf
    • https://cdn.shopify.com/s/files/1/0434/7107/7526/files/kavagefogopelagenir.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006748.bin
cb242b720507cea90b97200c6d27344102adf226caa38356e42fd574bbb0aeee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6748 5176 bytes
font_01_sfnt_off000078ef.bin
73e28abe63851db5d67a5283dd38bf043fc20c5865c27cd84f7897156ea6cb65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78EF 9948 bytes
font_02_sfnt_off00009b25.bin
a733a0b107cf3a02cba333ef25a6786257ac858a6f67525974a1bee595f4e5aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B25 17948 bytes

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