Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad205d0b2f9694e0…

MALICIOUS

PDF

45.6 KB Created: 2020-08-08 16:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e69f8949ec2d3bab2e5031951f83762 SHA-1: bd530c97a5f93bd231fc2e9a23a5a5b2975b902c SHA-256: ad205d0b2f9694e0693d45c57de79abdf73bdffb769c00560b5092c0232f5905
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=mrityunjay+novel+pdf+in+marathi', is identified as a malicious redirector. The document also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic to disguise malicious content. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to lure users to malicious sites.

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=mrityunjay+novel+pdf+in+marathi
    • http://files.printshope.com/uploads/1/3/0/9/130969600/2f2f5e3d7d69486.pdf
    • http://files.uncamwho.org/uploads/1/3/2/6/132695576/bagul_pigokuzekobumom.pdf
    • http://files.ladyslipperstudios.com/uploads/1/3/0/7/130775490/desus-vagowikawituvul-newopanexi-vukoma.pdf
    • http://files.deweyfleszar.com/uploads/1/3/2/8/132815752/xerexamezeba.pdf
    • http://fikob.stoneycreeklabradors.com/uploads/1/3/1/0/131070420/pirebigudon.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9670/files/4057761264.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lejozusuxawunulimedobina.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/45911347136.pdf
    • https://cdn.shopify.com/s/files/1/0429/8381/7375/files/werebezabiwulizedutamigi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6939/files/dewufizofebaputom.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/math_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/1401/3606/files/wawemobezufumogituvoforot.pdf
    • https://cdn.shopify.com/s/files/1/0429/1765/8780/files/libro_de_anderson_estadistica_para_administracion_y_economia.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/cactus_common_names_and_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nezax.pdf
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/22734881819.pdf
    • https://cdn.shopify.com/s/files/1/0433/3453/3275/files/istqb_glossary_download.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_off000073c4.bin
13e9a2068ddc2d4f60a1dd51cfdf20dc24e6bf1b2bc8de47c13e11a75761f4ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C4 5344 bytes
font_01_sfnt_off000085e4.bin
a75448f119582704768848d690493f2b4bda9ef570d66240a3aa31886fff1fd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85E4 10276 bytes

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