Malicious PDF — malware analysis report

Static analysis result for SHA-256 c897574f64a03d54…

MALICIOUS

PDF

45.6 KB Created: 2020-07-31 21:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f431bb9b58e261f921a67d21469c0e27 SHA-1: 069d6c1968461c3f687261ed541864b33c527aec SHA-256: c897574f64a03d547681a8c125fbae7dcc05a60f1a3703454c1d7eb5b3c55aea
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The embedded URL 'https://ttraff.ru/pify?keyword=is+touchcopy+safe' is likely a malicious redirector, while the numerous shopify links are part of the link farm. No scripts were extracted, but the overall structure points to a malicious redirection or SEO abuse attack pattern.

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=is+touchcopy+safe
    • http://files.wendhigalephotography.com/uploads/1/3/1/6/131606060/c6a915.pdf
    • http://files.ourladysyork.org.uk/uploads/1/3/0/7/130738550/3e88fa4dfa4216.pdf
    • http://files.lecheminantbooks.com/uploads/1/3/1/8/131860938/49e51134f872f2.pdf
    • http://files.forresterflooring.net/uploads/1/3/1/1/131164260/8769245.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/zibomowupazilutite.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8918/files/mimawegapibawutekeleniziv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/venesarexogipabunojadade.pdf
    • https://cdn.shopify.com/s/files/1/0433/4511/7342/files/nemoro.pdf
    • https://cdn.shopify.com/s/files/1/0431/9690/7678/files/43032400030.pdf
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/gifuverijibagisegomiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vibamiwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/tejarozotabifajojor.pdf
    • https://cdn.shopify.com/s/files/1/0433/2398/1979/files/mifotasuvi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/28398406560.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/73258025441.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/microeconomics_for_today_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/7668/1882/files/58541073078.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_off000068b7.bin
cd72ac09aefd75f2b1c13e5e32a44b7809763f644884313640fa320bdfbe9117		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B7 4744 bytes
font_01_sfnt_off000078f3.bin
c4acca2aa53c643da3ba1461b810eb53e3608e143a00ecb05a72568fda63b22b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F3 10152 bytes
font_02_sfnt_off00009bb6.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB6 4324 bytes

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