Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b3dd02ed6cdddc…

MALICIOUS

PDF

54.7 KB Created: 2020-08-11 09:36:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 179c06d0a09f36ea4095f3b64f08d0dd SHA-1: 3286af3ea4c19e52bec739713e8334e1632222bf SHA-256: f5b3dd02ed6cdddce3c41da65ca98382d0116f4779fac2df0441f1040d33a2d6
154 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 'https://ttraff.ru/pify?keyword=avensis+cennik+2020+pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful sites. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content broadly. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence of malicious intent.

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=avensis+cennik+2020+pdf
    • http://files.vervainandrue.com/uploads/1/3/2/3/132303068/gigepa.pdf
    • http://files.field-contemporary.com/uploads/1/3/0/8/130814387/4d295841dfbedd.pdf
    • http://files.newhopeohio.net/uploads/1/3/1/1/131164063/3513466.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/que_son_los_chakras.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4951/files/44491334973.pdf
    • https://cdn.shopify.com/s/files/1/0434/8729/7696/files/54315591338.pdf
    • https://cdn.shopify.com/s/files/1/0429/5367/0822/files/value_investing_and_behavioural_finance.pdf
    • https://cdn.shopify.com/s/files/1/0430/3467/3305/files/luxurubewabugelan.pdf
    • https://cdn.shopify.com/s/files/1/0437/8483/1125/files/wijexotikegikixuxusexiki.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4326/files/buddhist_bible.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/36007986683.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6375/files/najazotabujugalemena.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9610/files/91316049138.pdf
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/3697949168.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006238.bin
120dfd7c7977cfb9a90e0c19aa24ce80f3ad63f69756627d616fe21accc03e95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6238 6424 bytes
font_01_sfnt_off0000721a.bin
c6925e7a339a1828cb009bcff45dea9ab83d78866ae0e1c1e098246f7824304d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721A 4796 bytes
font_02_sfnt_off00008281.bin
bf19cc1662ccb8abc0ec9d9b9beaf4c243f428d2536d76def3f2b810b81b33cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8281 12836 bytes
font_03_sfnt_off0000aa18.bin
f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA18 16144 bytes
font_04_sfnt_off0000bf19.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF19 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.