Malicious PDF — malware analysis report

Static analysis result for SHA-256 758d098f58f56ee3…

MALICIOUS

PDF

43.0 KB Created: 2020-08-05 04:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30881991ef412e84c362f63c2f2ce5b6 SHA-1: f3ab4b5816b6157eca8b4190587d5a6c722fd2e5 SHA-256: 758d098f58f56ee33e418bdde6befb3c973ab1d5bf724317d620d2e0a169abc1
194 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to Shopify domains, suggesting an attempt to manipulate search engine results or distribute content. One critical finding is a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=blank+swot+analysis+template+pdf
    • http://files.hacd.org/uploads/1/3/1/4/131438193/mufesavixurogab_tuwipuxijaboxol.pdf
    • http://files.mbarchitectureanddesign.com/uploads/1/3/0/8/130814346/6205249.pdf
    • http://files.fireecologyandbiodiversity.com/uploads/1/3/2/6/132695805/90cd4277.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6251/8182/files/zokatirejet.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/curl_content-_type.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/43831360902.pdf
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/printable_periodic_table_black_and_white.pdf
    • https://cdn.shopify.com/s/files/1/0431/8953/4869/files/40010721071.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/vegetobegijepe.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/taxidet.pdf
    • https://cdn.shopify.com/s/files/1/0430/6278/8245/files/92589356748.pdf
    • https://cdn.shopify.com/s/files/1/0430/0813/1233/files/fawexepugif.pdf
    • https://cdn.shopify.com/s/files/1/0434/1497/8718/files/87224958483.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1364/files/748052964.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7674/files/tiny_dancer_elton_john_piano_sheet_music_4f9bf7fc-6272-4d78-b8d4-0f7292cbed31.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/vilasefutuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8252/2528/files/96612612628.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/
    • https://cdn.shopify.com/s/files/1/042
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069ff.bin
ccbf395d35b489e48fd2ae28db085b51e592a7e31f01e00128fb0f2563e68226		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FF 5400 bytes
font_01_sfnt_off00007c70.bin
11395cbb57ef229b4232113fbac05cb97006af8855c4cbd3188b55c61e72af12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C70 10092 bytes

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