Malicious PDF — malware analysis report

Static analysis result for SHA-256 5009d246dfc23c63…

MALICIOUS

PDF

44.3 KB Created: 2020-08-13 21:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3705a0038a7cde48f9813d3c2f2cfc5e SHA-1: a2a2e3398d3f0d5d5574820b63659b2d04631dd0 SHA-256: 5009d246dfc23c63f53776417e1f1ccab3722efca8bd3a45cf287f9af3d8bb4e
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources, indicating a link farm or redirection strategy. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=chidinma+fallen+in+love+video++mp4', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting an attempt to drive traffic to malicious sites, possibly for phishing or malware distribution.

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=chidinma+fallen+in+love+video++mp4
    • http://files.bigpineschools.org/uploads/1/3/1/8/131871648/gapokolefawe.pdf
    • http://files.constantcovering.com/uploads/1/3/0/9/130969887/8d0f04560.pdf
    • http://files.heidisproductreviews.com/uploads/1/3/0/8/130873917/5f452b8d0a214.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/vanowogunonajalax.pdf
    • https://cdn.shopify.com/s/files/1/0432/5464/4894/files/lowebopezosewew.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/2743508840.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5290/files/3840344951.pdf
    • https://cdn.shopify.com/s/files/1/0437/1503/5291/files/68730827503.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/ziwalisuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/3879/2085/files/liwaregapuvobalaxomipage.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/nowunerenudagezuta.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977390730.pdf
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/pathfinder_bestiary_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/5007676560.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/85373947976.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/bevalurakoxopijosekapo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/95885651427.pdf
    • https://cdn.shopify.com/s/files/1/0437/1103/7591/files/john_deere_d105_manual.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_off00004b59.bin
b7091dd7de8210a8cb51cff8e27dde5a71784f80fc62f8e5264859650c225a8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B59 5060 bytes
font_01_sfnt_off00005c75.bin
d9570b4888a04b4ca13d884933f562656799c47c233c400e42be3161c5c2b4b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C75 11872 bytes
font_02_sfnt_off000083e1.bin
d33ac2a8cacf962645d01b831008f07a64302290f360889f8a56a9838ea38feb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83E1 18948 bytes

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