Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b517aca231ab88…

MALICIOUS

PDF

40.9 KB Created: 2020-08-11 06:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e75934bd27b3edcaad0e4bb917d8f5b SHA-1: c68cf91143309be6e94053e74f7ae64e5e19099b SHA-256: 22b517aca231ab88f459e6fec9489abe578bec3d3de45b177efc36aab00aba3a
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised with SEO-friendly keywords. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=best+free+pdf+reader+win+10', which is flagged as a malicious redirector. This suggests the PDF is designed to trick users into downloading malware by posing as a legitimate software update or utility.

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=best+free+pdf+reader+win+10
    • http://zanemivuj.stuartbmeyers.com/uploads/1/3/2/6/132681513/pajibapuvexib.pdf
    • http://kogiwiba.indianhoops.com/uploads/1/3/0/7/130776208/1412773.pdf
    • http://files.rwpphotoart.com/uploads/1/3/0/8/130813694/xareja.pdf
    • https://cdn.shopify.com/s/files/1/0431/9445/0082/files/rofagufigifukawanalusalep.pdf
    • https://cdn.shopify.com/s/files/1/0448/2121/7442/files/contoh_abstrak_tesis.pdf
    • https://cdn.shopify.com/s/files/1/0431/9304/1053/files/59181007439.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/96806730804.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/diromitaluwudezufapin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/66772490863.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9703/files/fizawikasof.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/6981/files/vanessa_carlton_white_house.pdf
    • https://cdn.shopify.com/s/files/1/0434/1963/1765/files/ginoporesuvegijamogatafa.pdf
    • https://cdn.shopify.com/s/files/1/0440/2823/1830/files/counselling_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9870/files/writing_business_bids_proposals_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0430/5754/5365/files/lokutufiwewewenuxokago.pdf
    • https://cdn.shopify.com/s/files/1/0437/2008/1563/files/fosigevavego.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_off0000612a.bin
4e40c8e4a49a63aad201f8d29611b268b72196128410f1696717f9fc23aca1e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x612A 5336 bytes
font_01_sfnt_off00007378.bin
3ed3348d475b7d49b056d4b7a4634bf9661167bb8a42e7ef5a755c6f37931c6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7378 10392 bytes

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