Malicious PDF — malware analysis report

Static analysis result for SHA-256 faefc9fb4510b2ec…

MALICIOUS

PDF

51.7 KB Created: 2020-08-29 21:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcc27cf962192f0759169bde2d553a90 SHA-1: 439f1c1b5a74003eb0ee1c84911af6610abd5c45 SHA-256: faefc9fb4510b2ec1d935caab48dda5356cf3ed2de6d4c74108569469b07d1f1
152 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with one specifically identified as a malicious redirector. The document body text, though partially obfuscated, contains the phrase 'Eu fico loko netflix' and the malicious URL, suggesting a lure to potentially malicious content. The presence of numerous links, many pointing to Shopify domains, indicates a link farm strategy to obscure the ultimate destination. No scripts were extracted from this sample.

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/wix?keyword=eu+fico+loko+netflix
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/42847249997.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/fikisod.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/60972347851.pdf
    • https://static.usrfiles.com/ugd/b8c837_012eaa64d26d44bcacde788e94d234b1.pdf
    • https://static.usrfiles.com/ugd/4b7290_22fac7691a554797b977d640b3b743fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed426657fc0c469bba22da7019b26597.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/booty_king_home_workout.pdf
    • https://cdn.shopify.com/s/files/1/0429/5432/6179/files/63690298824.pdf
    • https://cdn.shopify.com/s/files/1/0441/3590/7480/files/defavedumunutijiva.pdf
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/70871777561.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/jaxobegigeja.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_off0000630e.bin
d9d9fe61415fa437ae3c9c808ef86427f18e216d9794196d181972cb0f461676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x630E 4364 bytes
font_01_sfnt_off000071ec.bin
9ac488501cf383c9bdea4e9ab2b538d4abf353152eaac64f25895925cc38087a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71EC 1896 bytes
font_02_sfnt_off00007b04.bin
b38c6ebcc7998ff4ab87d74afd1272520c9128008dc9bcd70f77dfc853778189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B04 10420 bytes
font_03_sfnt_off00009ee6.bin
1398bbf2dfd9cae4409d1d8ab67a79f495e147aa07cce54436be1c2862721d78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EE6 16064 bytes
font_04_sfnt_off0000b389.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB389 4324 bytes

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