Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad564f366bc4862…

MALICIOUS

PDF

39.9 KB Created: 2020-09-18 04:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1839598c5347de4fbe34ccd8a88bbaa7 SHA-1: f693247928c51cf86f00fd920a31e7b7bf307d2a SHA-256: 4ad564f366bc4862662e645d6585892744acccd008048e7c81642a5bda9abd4c
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Tales of the black widow company' and includes the malicious URL. The presence of a link farm and the ML classifier's high confidence score further support the malicious nature of this document, likely intended to redirect users to a malicious site.

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.me/wix?keyword=tales+of+the+black+widow+company+pdf
    • https://cdn.shopify
    • https://c0b5e229-7213-4922-bd29-aa353399c13e.filesusr.com/ugd/3c2e2e_1721301b12404c42add37c868848877b.pdf?index=true
    • https://c019eb10-db09-4dc1-ab7b-e1b9a5b5e17a.filesusr.com/ugd/b48b60_62ba98d054b24f0ea60df0599b603bbd.pdf?index=true
    • https://7b4123c9-7afd-4eb4-8c07-380c13c1dd8c.filesusr.com/ugd/a2e20a_72979d0184c24afdb20c73f0ba3c91ab.pdf?index=true
    • https://43911fdd-48e4-47c8-aa01-32c54967c04a.filesusr.com/ugd/286fb8_f08500156b15454590663dc6bb563435.pdf?index=true
    • https://c320971a-473b-481d-9569-c062a4413402.filesusr.com/ugd/d43733_27e705b9a4cb4d529f57a5850a5f40c7.pdf?index=true
    • https://4dc279b6-ffbb-4f35-8bde-b329724bbdbb.filesusr.com/ugd/911c12_82fb92f5289a43aba3361acba6b64420.pdf?index=true
    • https://aadd6aa7-4ade-4c09-bd42-6bb32a48a9b3.filesusr.com/ugd/0ad6c7_e5f3ff2a4e274a018d97748016defa47.pdf?index=true
    • https://84d1550a-255b-4d30-b1cf-c174426c7e55.filesusr.com/ugd/696117_52ec98439a204ea9a5d88654fcc2da20.pdf?index=true
    • https://d7c520e9-031c-4622-a0c0-6948a0780413.filesusr.com/ugd/5b1e3c_7d4db3730246453d892a52d02a798951.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0438/0898/1152/files/78728513892.pdf
    • https://cdn.shopify.com/s/files/1/0452/4402/2944/files/teori_akuntansi_biaya.pdf
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/53277864769.pdf
    • https://cdn.shopify.com/s/files/1/0437/0799/0169/files/aankh_mare_simba_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9947/files/21006385167.pdf
    • https://cdn.shopify.com/s/files/1/0432/6565/4939/files/alphabet_phonetic_international.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/socializacion_y_aprendizaje_social.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3383/files/battle_bears_gold_accounts.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_off00005c73.bin
4d58120ab5a089637d274f99caea50e64ad25689c84f08263f9ca4fb2f290011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C73 5644 bytes
font_01_sfnt_off00006f98.bin
fc863d9ec9d0ce0470bd758ed05a9d27f35760f73eb8589da6f9b5501262fa42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F98 10204 bytes

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