Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f5bbc783998de97…

MALICIOUS

PDF

40.2 KB Created: 2020-09-18 02:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e6e95d6421f4414a2f9b8a343d5bfd7 SHA-1: 04abac45351f8b3599b2f1c3029780f3e677bd75 SHA-256: 8f5bbc783998de9731ed498b0e915425150528cdc3f1bd0bbc6887af6e1e0b33
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly the one from ttraff.link, are likely part of a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains references to the URLs, reinforcing their malicious intent.

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.link/wix?keyword=cajun+injector+electric+smoker+turkey+recipes
    • http://files.lisakaulphotography.com/uploads/1/3/1/1/131163976/4618291.pdf
    • http://files.philadelphialogisticscenter.com/uploads/1/3/1/1/131164476/jokimolomi.pdf
    • http://files.cineforgemedia.com/uploads/1/3/2/7/132740239/fupusodojivulo.pdf
    • https://f3f0473a-d8f9-4fe6-aac6-a5b7f15b4a4e.filesusr.com/ugd/7baf93_245d1ebb19844ab99ecab8b76c9989d2.pdf?index=true
    • https://31ca5d11-c49b-4fbb-86fe-2b006f1c3165.filesusr.com/ugd/003b86_5d40f7b028de4e4b84bba132aedb36cb.pdf?index=true
    • https://7d6af513-243a-4992-b16f-b97c09b8967f.filesusr.com/ugd/48f461_6e10a7f0fc5d4d28a63c6f68adf3410c.pdf?index=true
    • https://3b93a53f-7ac2-48dc-b474-317baee0c206.filesusr.com/ugd/33a2e4_8ea665e717d443f8b54d6eb02f584944.pdf?index=true
    • https://a1dd51f6-ef22-48cd-acc0-407d7f7e4f84.filesusr.com/ugd/bca722_c215e48186b54889b2653f78f58eaa97.pdf?index=true
    • https://40531282-6864-4235-84fc-1392ce43b2a3.filesusr.com/ugd/3724a2_2231bce6abf44c19adee0f86d6050000.pdf?index=true
    • https://5860328e-8962-45d0-add7-9a224ec34e3e.filesusr.com/ugd/fedf23_98f007d0ba294be498a16e76415485a0.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/50704410889.pdf
    • https://cdn.shopify.com/s/files/1/0434/4905/7430/files/minuwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/53097963342.pdf
    • https://cdn.shopify.com/s/files/1/0437/6929/9098/files/kegejiligaviwilugajeginam.pdf
    • https://cdn.shopify.com/s/files/1/0435/1403/6376/files/zimomanuditavuvunifaxanu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050eb.bin
21d5336ad6190c1b791e475f612daed5fcff8f11fd2d18b1b2d0bbe065a1617f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50EB 5224 bytes
font_01_sfnt_off000062ae.bin
c93f9e96a4dc4c05f9305fe746b4bf7efc5b5587f7dbb53a62b1ce1ddf931300		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62AE 10224 bytes
font_02_sfnt_off000085a4.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85A4 4324 bytes

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