Malicious PDF — malware analysis report

Static analysis result for SHA-256 3278d9f9c61dab7b…

MALICIOUS

PDF

115.6 KB Created: 2020-08-10 10:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a0cf2645244dcb972972e8b5d8b578f SHA-1: 8dae449f81fef09a2380d6e25d61ce57bb92c9fd SHA-256: 3278d9f9c61dab7bbf3ddf4cfcc8bdf972b1689e5d16f612191e791df341c196
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of the malicious redirector suggests the document's primary purpose is to lure the user to a harmful site.

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.ru/pify?keyword=there+is+a+god+antony+flew+pdf+%25D9%2585%25D8%25AA%25D8%25B1%25D8%25AC%25D9%2585
    • http://files.ronnieroseband.com/uploads/1/3/0/8/130874010/7684e.pdf
    • http://files.springadingding.com/uploads/1/3/1/6/131637016/gunavutajozire-loxojiko-zatuji.pdf
    • http://files.thefirmuk.com/uploads/1/3/1/8/131871571/vulipilofin_tabuxomoviwakek_fozotenepazime_nunova.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/fapesalanomudobatibuse.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6791/files/37582645955.pdf
    • https://cdn.shopify.com/s/files/1/0432/4530/6011/files/dizev.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/pip_application_form_scotland.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0081/files/biginazivadetib.pdf
    • https://cdn.shopify.com/s/files/1/0431/4900/0864/files/nse_bse_holiday_list_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/wedowatejurixudimewu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5083/4847/files/49287174279.pdf
    • https://cdn.shopify.com/s/files/1/0438/8985/2571/files/kitchenaid_food_processor_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/zakaton.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/2996700268.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/bixabukunuxalimatupito.pdf
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/gene_flow_and_genetic_drift.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001522e.bin
7c530cf51ed6a3fcff6596d95ac90f23e4d9dbaf44cf25c751b0bd750021eb5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1522E 5444 bytes
font_01_sfnt_off000164ca.bin
1b2816e6c4933a1863b90ccf1f9bc7db61b9b8bf03ec898ec532b6b1c6681d0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x164CA 10824 bytes
font_02_sfnt_off00018906.bin
c66271cf26487cee469d325c9e7248c06d85ef86c7677d5c8f5ee5df896497f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18906 16728 bytes
font_03_sfnt_off0001a075.bin
ccdf4695de701234959a22d6be315526d2e1fdb4d530c98fd30fb8eebc15bda4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A075 18700 bytes

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