Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3446d3daf7b550…

MALICIOUS

PDF

44.1 KB Created: 2020-08-23 00:38:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 596706ff197608c1995ced58814cdf35 SHA-1: 2d90dd314c4485cd838ff2677c7d7cc020e70a30 SHA-256: 0a3446d3daf7b5501c66ae7cfc0d702a082c7e0c81ba665d18cd2e0dba2da60c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for game downloads, suggesting a phishing or scam attempt. The presence of multiple external links, including a link farm, further supports the malicious intent of directing users to potentially harmful 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.ru/pify?keyword=badland+2+game++for+android
    • http://gugolad.nataliemariaclark.com/uploads/1/3/1/4/131437243/zemom.pdf
    • http://molosez.maxweltontherapygroup.ca/uploads/1/3/1/4/131453850/gebakifadunupasax.pdf
    • http://files.connallyband.com/uploads/1/3/1/8/131856381/koguwoxixude.pdf
    • http://files.key2evolve.com/uploads/1/3/0/8/130874318/zasabuxemer_xawapikiguromik_balasoge.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/80780673535.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/garuramasokevu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8762/4344/files/55680332528.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/likelevebisivun.pdf
    • https://cdn.shopify.com/s/files/1/0437/4288/8097/files/madamozedor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89352644259.pdf
    • https://cdn.shopify.com/s/files/1/0431/6371/3695/files/82606018681.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91960476686.pdf
    • https://cdn.shopify.com/s/files/1/0461/3373/9673/files/91845260284.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/77247103286.pdf
    • https://cdn.shopify.com/s/files/1/0434/0373/9294/files/wuvoxemufemotapetuwoni.pdf
    • https://cdn.shopify.com/s/files/1/0432/4546/9858/files/91547566248.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000604b.bin
65e28d30711497ad3dca7bc24a019186656ad69ef80ad8828834f3174e16c55d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x604B 4936 bytes
font_01_sfnt_off000070f2.bin
00f0af1b6fc6cf8a7a8fd217957bacaedf1e487ab5ad686087afe573f229c925		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F2 10704 bytes
font_02_sfnt_off00009595.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9595 4324 bytes

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