Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de97709030b8136…

MALICIOUS

PDF

48.4 KB Created: 2020-07-21 04:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb409d9d4259f77430bb8ab9abf89dc5 SHA-1: 562895adb6a8ab41c43e7c4a2f724dd17b112690 SHA-256: 1de97709030b81361d1289ad140b0150605fcb2fe12347bc4cb40f9c2770f548
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a video game mod ('Gta 4 lcpdfr taser not working'), likely serving as a lure. The presence of numerous external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to distribute the malicious content. The ML classifier strongly indicates malicious intent.

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/wb?keyword=gta%204%20lcpdfr%20taser%20not%20working
    • http://files.cornflowerglass.com/uploads/1/3/2/7/132740253/supelaligarug.pdf
    • http://files.michelleleblancshortstories.com/uploads/1/3/1/1/131164113/2df4f18b3da.pdf
    • http://files.holdenengineeringinc.com/uploads/1/3/2/7/132712011/xutanonatobenikoxe.pdf
    • http://files.sscoinworks.com/uploads/1/3/0/9/130969481/kudalubokowipak.pdf
    • http://files.holdenengineeringinc.com/uploads/1/3/2/7/132712011/xutanon
    • https://cdn.shopify.com/s/files/1/0435/2973/2248/files/gewogutivonam.pdf
    • https://cdn.shopify.com/s/files/1/0436/5733/0853/files/41823313306.pdf
    • https://cdn.shopify.com/s/files/1/0436/4645/1862/files/61585154974.pdf
    • https://cdn.shopify.com/s/files/1/0430/2507/2282/files/zinunesu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/kebetidaw.pdf
    • https://sawamadet.files.wordpress.com/2020/07/meretegifus.pdf
    • https://rilamexix970799637.files.wordpress.com/2020/06/vopexaxowovojedi.pdf
    • https://femoretip.files.wordpress.com/2020/06/doxadizegutivixinurumob.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/jivadomiketomow.pdf
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/vulewivudule.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/7234442226.pdf
    • https://cdn.shopify.com/s/files/1/0433/0278/1083/files/27718257417.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/23727785815.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.pdf
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/marekulemazogo.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_off00007fd9.bin
3163eb81dd2d8090c316a1e1e3fa9e96dedb74a91e60c8be9b7e31f3f9a8f3d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD9 5388 bytes
font_01_sfnt_off0000925d.bin
e5384bbda90c66228ca9e34bec38fd91381cafa30df54e997c73a1447abc82c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x925D 9980 bytes

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