Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d8879b8263b8c6…

MALICIOUS

PDF

44.6 KB Created: 2020-08-06 05:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a31d21f8aa1487d027f5f4fafed5cce SHA-1: 2ad766c296716e517d57c5ddd8ca3df756c45ceb SHA-256: c7d8879b8263b8c63b05c51dd282e126a84e59b0982756cf8d6e6e00993a232b
150 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 a malicious redirector link and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.com/pify?keyword=bncc+do+ensino+m%25C3%25A9dio+em+pdf. While the document body contains garbled text, the presence of numerous links points towards a deceptive or malicious intent, likely to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=bncc+do+ensino+m%25C3%25A9dio+em+pdf
    • http://files.globaltimberinc.com/uploads/1/3/2/3/132303133/4728891.pdf
    • http://files.the5thparlour.org/uploads/1/3/0/8/130814076/nupurevofugod-rekudotekajom-gabajeta-bupofikamirav.pdf
    • http://files.carlsbaddesal.com/uploads/1/3/1/4/131438180/fagaz.pdf
    • https://cdn.shopify.com/s/files/1/0440/8334/7606/files/beginners_english_questions.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/21937885364.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/gisevowa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7745/1428/files/zidelaleje.pdf
    • https://cdn.shopify.com/s/files/1/0428/3092/1895/files/b._sc_maths_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/barry_s_bootcamp_workout_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wixedazatujiguxup.pdf
    • https://cdn.shopify.com/s/files/1/0430/9729/2949/files/fafuwevamojupufaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8560/2721/files/77120699378.pdf
    • https://cdn.shopify.com/s/files/1/0433/8434/0630/files/73192875951.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/all_the_lovely_bad_ones_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/77179474004.pdf
    • https://cdn.shopify.com/s/files/1/0434/6229/5714/files/fegepitij.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/64219808307.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_off00006ca2.bin
040385267a8781ee6dcdf1606a5f2f402d6a168195e38c4f946f33855756d44d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA2 5152 bytes
font_01_sfnt_off00007ddf.bin
7c71c50766fb3fc3321011884ec6a35c6ff9f7aae3c13a27b01ebbd4d28e58f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDF 12528 bytes