Malicious PDF — malware analysis report

Static analysis result for SHA-256 7322df1f061378d5…

MALICIOUS

PDF

40.6 KB Created: 2020-08-16 21:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfd3ed6b50e4cbc28621d86031006234 SHA-1: 4d7ba7358d2d19a90efaef1ee263a13abeee4650 SHA-256: 7322df1f061378d5e7fb7b1a37deb74f804ff7f9d8404d5c4a811e1467781650
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, with one pointing to a known malicious redirector. The document body and heuristic firings indicate a lure for an advance-fee scam, likely attempting to trick the user into visiting the malicious URL for a fake prize or parcel. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=adonit+jot+script+evernote+manual
    • http://files.aspectsandangles.com/uploads/1/3/1/0/131070202/2827e7b6afb5.pdf
    • http://files.bodyworkceus.net/uploads/1/3/0/9/130969143/rigek-xelur.pdf
    • http://zagenek.lindenhillspottery.com/uploads/1/3/0/7/130739693/weruzajepe_pokizizes_sorijekub.pdf
    • http://files.jordanstovall.com/uploads/1/3/0/9/130969306/vimavugukenajuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/zogadebodenar.pdf
    • https://cdn.shopify.com/s/files/1/0450/3266/9334/files/probability_distribution_binomial_plots_calculates_the_and_cdf.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/juvajiri.pdf
    • https://cdn.shopify.com/s/files/1/0431/3235/4711/files/20649238885.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/76828230393.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/soft_skills_file.pdf
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/kimaxakuba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21659337375.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/bible_study_topics_for_adults.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/zuzakilisikigopukobezase.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eb6.bin
aa8ade90641cf43bc7e9dbbecc1bffda4b1ad1a455a0ed6e6cdb479e955f4155		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB6 5344 bytes
font_01_sfnt_off000070d6.bin
bca8bbe24aade76c390da44c1359de99c4fc19ba1c169a829b66f174712c2c50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D6 10812 bytes

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