Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7da02ea952804dc…

MALICIOUS

PDF

80.5 KB Created: 2020-08-18 15:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33c7bae0646b94b36208bbbadad97b95 SHA-1: a3cb92f94a39e88e7731de02109f5c75d44b3a50 SHA-256: e7da02ea952804dc15edafd3adf1705bce90a0a92714c42bf89b039245683c8a
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/pify?keyword=little+witch+academia+free', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of a link farm suggests an attempt to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/pify?keyword=little+witch+academia+free
    • http://files.sophiesticated-travelstories.com/uploads/1/3/1/1/131164052/9517d26ee.pdf
    • http://files.kimberlyjherb.com/uploads/1/3/1/4/131407734/6aaa27c09255.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/lowrance_fish_finder_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0096/2977/files/rubapojejurororeki.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/sozinelejov.pdf
    • https://cdn.shopify.com/s/files/1/0433/2814/3510/files/nutazudabomapatozonixen.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/penusudaxuzagowikegetuje.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/wavumiwubirolon.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6867/files/python_weather_script.pdf
    • https://cdn.shopify.com/s/files/1/0437/7313/2957/files/french_to_english_translation_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/5583/1445/files/81626037129.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b5a.bin
44633cb415dc6b76efca125d4f4b1583fd67c1cf8b979bb4f9fc5203d9a408fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B5A 21096 bytes
font_01_sfnt_off0000dd86.bin
ddc9796ca8c1b7ce454a4fe2379d218942c280a9ce6660d2f286d97c95f94ac6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD86 5116 bytes
font_02_sfnt_off0000eece.bin
dfe04fd1bfd85df76f82ab1d506494e393001e21f7ae66c19b5638f3fc6182e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEECE 1688 bytes
font_03_sfnt_off0000f74e.bin
49b3541c5a36ad45c403ad1a887d57089734b0a36b01736fa22ef71838da43c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF74E 10948 bytes
font_04_sfnt_off00011cf1.bin
8c4f20850708d391b115a482448c651f2a982fbdf20ce527d670e7cbafe14b49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF1 16232 bytes

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