Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde02d7a163768b0…

MALICIOUS

PDF

81.5 KB Created: 2020-08-31 03:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de62f3b9b37770ddf0d3924320837fd5 SHA-1: df11a8886711f6ca61a58e5a1e8c3e5393972e70 SHA-256: fde02d7a163768b0c1b6d9f999894772c928f855b20c52b0dee1e34383e37ecc
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=principales+fallas+en+circuitos+elec', which is also listed as a malicious redirector. The presence of a link farm further supports the intent to distribute malicious content.

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.ru/wix?keyword=principales+fallas+en+circuitos+elec
    • https://static.usrfiles.com/ugd/bdeb4c_3d0bd60e6d91404bba2e8bb7bd56f447.pdf
    • https://static.usrfiles.com/ugd/8de238_3946afbc92264e5d8928822b87a4be9b.pdf
    • https://static.usrfiles.com/ugd/22bf55_b42c86fdda8a48609ae81297ab59eb4e.pdf
    • https://static.usrfiles.com/ugd/d78803_727796c7dcb04783a9fe479b86a9bb0c.pdf
    • https://cdn.shopify.com/s/files/1/0429/2132/8807/files/miwaza.pdf
    • https://cdn.shopify.com/s/files/1/0430/4325/8519/files/8274787512.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46824776831.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/the_casebook_of_sherlock_holmes_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/6410/5886/files/outlook_address_book_to_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/abelian_group_in_discrete_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0435/7780/2911/files/bromhidrosis_apocrina.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0300/files/41629040701.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/zijasod.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/brain_out_game_level_41_answer.pdf
    • https://cdn.shopify.com/s/files/1/0433/4069/3662/files/87470604530.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_off0000dab2.bin
78e822978c899aa3e6e10f0cd46230096144a1128725dc9497a38ab361531fd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB2 4892 bytes
font_01_sfnt_off0000eb51.bin
3bc96ba40ab8fb731e0fd3e8eaae966e70f06a48f6d7701844ad792a51aad1c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB51 12488 bytes
font_02_sfnt_off00011351.bin
d1dc95b0e8bbe24ea4fe421922b966938a53cbf279330fe4f51e3d08919df969		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11351 16148 bytes
font_03_sfnt_off00012857.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12857 4324 bytes

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