Malicious PDF — malware analysis report

Static analysis result for SHA-256 faac3453d46d405b…

MALICIOUS

PDF

56.7 KB Created: 2020-08-01 23:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 119bc543af3789edc4fd78be1d942cbd SHA-1: c1bec78fc5c69b0370c7f3c559cb8b71e0363e5c SHA-256: faac3453d46d405b44efcbf00256a11c2ee5d079fef1a2fb76a2f9f0d5529b64
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a link farm of 30 external PDF links, with the primary redirector pointing to ttraff.com. This indicates a likely attempt to distribute malicious content or conduct phishing operations by leveraging numerous external resources. The document body itself contains garbled text and a reference to the malicious URL, further supporting this assessment.

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=minecraft+tinkers+construct+duritae
    • http://files.greenpestsolutionsgps.com/uploads/1/3/0/9/130969298/xigewazaju.pdf
    • http://files.angelbluemarketing.com/uploads/1/3/1/4/131408970/59028f8fd16c.pdf
    • http://files.cjonespr.com/uploads/1/3/1/0/131070325/4155953.pdf
    • http://files.oakridgefootballbooster.com/uploads/1/3/1/4/131438869/sezututa_jalex_vusulidanoj_worojoti.pdf
    • http://files.taupobiblechurch.org.nz/uploads/1/3/0/7/130739143/7933594.pdf
    • https://cdn.shopify.com/s/files/1/0428/6670/4550/files/woodmaxx_wm-_8h.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/xapefatilizopekejug.pdf
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/duwudevugimo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/binoluso.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/97128403709.pdf
    • https://cdn.shopify.com/s/files/1/0429/1428/3686/files/68546879186.pdf
    • https://cdn.shopify.com/s/files/1/0439/2694/5947/files/chemistry_4th_edition_gilbert.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/nasepojedifewa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6092/8405/files/fafesa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/nazesixuk.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/98694954512.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3813/files/wusamigujabewafar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/gebigod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9059/2422/files/pisofesutonepas.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f4e.bin
19786e2f01a39476a229923e22551c4a162631a15dee7708be62895c54ba25a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F4E 5052 bytes
font_01_sfnt_off0000b09d.bin
827ea6633ec58d00b2fee7b349cfa7b4295615cb2cbd6b6309d54afb3f2b80f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB09D 10668 bytes

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