Malicious PDF — malware analysis report

Static analysis result for SHA-256 3645888d22bcacc7…

MALICIOUS

PDF

39.6 KB Created: 2020-08-10 19:33:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 564134d40aac45b2c60b62e571a1ce18 SHA-1: e742700c038afe614237258824d203c79eadf97c SHA-256: 3645888d22bcacc76bad116aa35411da6b280ce3a28c897a7549215fd49c393a
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=jpg+to+pdf+free'. This indicates a phishing or social engineering attempt disguised as a utility. The document body, though heavily obfuscated, also contains this URL, reinforcing the lure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm used to obscure the malicious destination. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=jpg+to+pdf+free
    • http://files.bonafidemealprep.com/uploads/1/3/2/6/132695602/xijor_muriwetot_sofimugagiwi_mewujizagofob.pdf
    • http://files.gregorystringfield.com/uploads/1/3/1/6/131637921/ritonez.pdf
    • http://kepolid.stuffrobpaints.com/uploads/1/3/1/3/131380213/xirubexaw-feribode-tajogapaduru.pdf
    • http://files.lfflyerfootball.com/uploads/1/3/2/7/132710763/d6c28a9.pdf
    • https://cdn.shopify.com/s/files/1/0430/9303/3111/files/74311872552.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4252/files/national_film_awards_2020_winners_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/18248176511.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/62744255429.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/genixevoxadexozovodot.pdf
    • https://cdn.shopify.com/s/files/1/0433/7955/6504/files/anencefalia_causas.pdf
    • https://cdn.shopify.com/s/files/1/0438/3067/3565/files/besojabiruwunifesizizived.pdf
    • https://cdn.shopify.com/s/files/1/0435/0210/8836/files/61564850797.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/mexew.pdf
    • https://cdn.shopify.com/s/files/1/0436/1669/8526/files/wedadanakosafiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/9875/7538/files/28577349498.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_off00005f85.bin
737ed1b490fed5723329bcaf07685391897cff95b3f165ce62116fa0fecb0626		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F85 4776 bytes
font_01_sfnt_off00006fd9.bin
917c2bab38cdeb8033fe7a42426acae7938118e7d6c6d437705cf393cf38de52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD9 10076 bytes

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