Malicious PDF — malware analysis report

Static analysis result for SHA-256 c60de71d23109134…

MALICIOUS

PDF

54.6 KB Created: 2020-07-31 05:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d090639577a67a4a64deb340515c6c84 SHA-1: de142656d5fbc21e51cbd211d85daec9b62094de SHA-256: c60de71d231091340778b18a56bab9d82af6a4b438a5e9893297c0e4eec12899
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one critical heuristic identifying it as a malicious redirector. The primary malicious URL, 'https://ttraff.com/pify?keyword=autobiography+of+a+yogi+in+marathi+pdf+free+download', is designed to lure users into downloading further malicious content. The document body, though heavily obfuscated, contains keywords related to downloading PDFs, reinforcing the lure.

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=autobiography+of+a+yogi+in+marathi+pdf+free+download
    • http://files.hsngenomics.org/uploads/1/3/2/8/132815385/bigurefezamuni.pdf
    • http://files.crystalynhutchens.com/uploads/1/3/2/8/132814241/a509f0c8241.pdf
    • http://files.paulreecephotography.com/uploads/1/3/1/6/131606392/56adf459.pdf
    • http://files.adentaitalia.com/uploads/1/3/1/4/131438389/vezile.pdf
    • http://files.rebuildinglauren.com/uploads/1/3/1/4/131454503/bojijudadapi.pdf
    • http://files.rebuildinglauren.com/uploads/1/
    • https://cdn.shopify.com/s/files/1/0431/6764/5857/files/26735436820.pdf
    • https://cdn.shopify.com/s/files/1/0432/2987/2292/files/miregexem.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/82369242363.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3376/files/71982398298.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/35592879879.pdf
    • https://cdn.shopify.com/s/files/1/0439/1773/8152/files/83981881673.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/wugoxesolikiripa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8185/0268/files/35048841271.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0581/files/36144026238.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/semupatukerulisakar.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c03.bin
ec08c7e66374668c7a49811711c0509be29e5bc4c287efb3434cfaaaf26e6d1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C03 5480 bytes
font_01_sfnt_off00007e88.bin
b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E88 3720 bytes
font_02_sfnt_off000089eb.bin
0a6256971eb61d826ee0927a328b8474407456eff2b167d986d90df8c3128cca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89EB 10012 bytes
font_03_sfnt_off0000ac66.bin
a53be41de3d30774e3cb508ca34d39c92d3427e24c356f397c76fab9a051fa37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC66 10044 bytes

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