Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dbc755e00fa13af…

MALICIOUS

PDF

35.2 KB Created: 2020-08-12 06:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af6ce1c7e62745f954107e3590b371d5 SHA-1: 1b3b9883aced25454bd8fd90c5d56875fdeb6f88 SHA-256: 4dbc755e00fa13afab8ad313d79e94e61a5ca6a9fcd75fbdb13feff0cc78b129
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a redirector service (ttraff.cc). This indicates a link farm strategy, likely intended to lure users to malicious websites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the redirector URL and the link farm structure strongly suggests a phishing or malware distribution attempt.

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.cc/pify?keyword=acca+f3+pocket+notes+pdf
    • http://kupoxu.myplaycafe.com/uploads/1/3/0/9/130969959/2859901.pdf
    • http://files.localbeetmealprep.com/uploads/1/3/1/4/131452841/sidulupemotikik.pdf
    • http://majewem.patchesoftimephotography.com/uploads/1/3/2/3/132303382/jokagoderajapodex.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/nozudazuteregik.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/scotts_2000_20.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/58224287020.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/18370285034.pdf
    • https://cdn.shopify.com/s/files/1/0434/1337/3084/files/85375112444.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mosagewenusuwaguxizekud.pdf
    • https://cdn.shopify.com/s/files/1/0434/8506/9478/files/naruto_shippuden_movie_6_english_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0429/3358/4028/files/volejibed.pdf
    • https://cdn.shopify.com/s/files/1/0439/2484/8795/files/criminal_psychology_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/4522/3591/files/roborilajixudebi.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_off00004bc1.bin
fd56b4a526678ac0933d3d4f284eb94b38131b4497dda08a2561147291488400		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BC1 5240 bytes
font_01_sfnt_off00005da5.bin
285de5f94bb500300bb217131765213d2689ccc7c5d416afdd87f27595f38267		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA5 10080 bytes

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