Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd19cd28383a136…

MALICIOUS

PDF

41.0 KB Created: 2020-08-07 03:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7b983b433f722587e25eea97643ebd2 SHA-1: e6566d454fe86f7bdbcf2e8582dd7261d69c26f5 SHA-256: acd19cd28383a136718213d54ccbbc23488499ecdc384875809f119d9834121e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=printable+bunco+score+sheets+pdf, indicating a lure to download or view content related to 'printable bunco score sheets pdf' which then redirects to malicious infrastructure. No scripts were extracted from this sample.

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.cc/pify?keyword=printable+bunco+score+sheets+pdf
    • http://guwupis.palmerhaasch.com/uploads/1/3/1/4/131453555/xoxawupi-pusojajanixejir-rifupoliraxawos-vagutuli.pdf
    • http://files.priorityenvironmental.ca/uploads/1/3/2/7/132740415/poturowinu-pepurefeme-zomoxiru.pdf
    • http://files.southsidepsych.com/uploads/1/3/2/8/132814343/tojoz.pdf
    • http://files.jymshd.org/uploads/1/3/0/9/130969633/xupopex.pdf
    • http://files.cyclenewengland.com/uploads/1/3/1/4/131438418/sotuverulixip.pdf
    • https://cdn.shopify.com/s/files/1/0440/3511/3110/files/built_with_science_shred.pdf
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/wipezud.pdf
    • https://cdn.shopify.com/s/files/1/0430/5308/8919/files/function_of_brushes_in_dc_motor.pdf
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/saruzo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2247/3624/files/91548149997.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/thousand_needles_alliance_flight_path.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0070/files/jezufexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/34752859159.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3362/files/ad_d_2e.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75609531209.pdf
    • https://cdn.shopify.com/s/files/1/0432/6365/6099/files/2629224976.pdf
    • https://cdn.shopify.com/s/files/1/0433/4691/9579/files/32566418546.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6863/files/fapigeze.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_off00006242.bin
932cf0ab198394e7e6a4949699dd03c4f6c3f6ae77d87721205a1f0f033129e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6242 5384 bytes
font_01_sfnt_off0000747e.bin
9350727cbee3f575dc33314ee94432ad390ade54fa1288c63fb5af0a03352e7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x747E 10080 bytes

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