Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac503973f5cc815b…

MALICIOUS

PDF

42.0 KB Created: 2020-08-16 21:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d91402e29b03db20bf36324757da5879 SHA-1: 8f82e0d46aecf288c0b8b9102b11d78eea29ad77 SHA-256: ac503973f5cc815b005757394e35806e25fdabda4387365f50a7c3da801a7fba
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=rwc+emerging+markets+equity+fund+factsheet'. This indicates a link farm or redirection strategy designed to lead users to malicious content. 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.ru/pify?keyword=rwc+emerging+markets+equity+fund+factsheet
    • http://files.evedonphotography.com/uploads/1/3/1/0/131071035/daroxotagikuv_bapanomijakoxaw.pdf
    • http://files.timeoutsportsbarandgrill.net/uploads/1/3/2/6/132681901/nekuk_giredafu_setonuwuxuv.pdf
    • http://files.beachjerkylife.com/uploads/1/3/0/7/130775380/9579705.pdf
    • http://files.fascinobespoke.com/uploads/1/3/0/9/130969708/4477173.pdf
    • https://cdn.shopify.com/s/files/1/0432/7908/9824/files/71921347007.pdf
    • https://cdn.shopify.com/s/files/1/0435/5411/1656/files/70024905046.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1777/files/unity_get_component_of_another_gameobject.pdf
    • https://cdn.shopify.com/s/files/1/0438/6747/2037/files/toparapuvekewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9434/3834/files/8919180343.pdf
    • https://cdn.shopify.com/s/files/1/0437/4816/3733/files/ruwavawevavugulomawafulu.pdf
    • https://cdn.shopify.com/s/files/1/0447/8110/9405/files/toefl_certificate_sample.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/batitomikosipit.pdf
    • https://cdn.shopify.com/s/files/1/0436/4946/6526/files/56729139597.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/93170668429.pdf
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/54039092023.pdf
    • https://cdn.shopify.com/s/files/1/0434/6481/8838/files/fepumevaxuzivuwituz.pdf
    • https://cdn.shopify.com/s/files/1/0434/8159/6066/files/7128144038.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_off0000573f.bin
d0abb0ff34be302e0d22570493821771b8fad8e69aadd4c6011202935fe005af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x573F 5564 bytes
font_01_sfnt_off00006a06.bin
01a7d131fa09a0cea3d2780caece159116ffa790bc7353adb3b03a934f808948		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A06 10200 bytes
font_02_sfnt_off00008cd6.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD6 4324 bytes

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