Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea650a745ea5320…

MALICIOUS

PDF

65.5 KB Created: 2020-08-06 17:36:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2fdf3274766f495fe01c0aa2b65f6e1 SHA-1: 6fa4c1d8bbf71b92eb0ac764aa9687d4a3952a89 SHA-256: 3ea650a745ea53208c90f359c117bc91f8ff24281b6dce597779ce5787074ebd
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, so the primary attack vector appears to be the malicious redirection.

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.ru/pify?keyword=tesis+de+habitos+alimentarios+pdf
    • http://files.youtubetechguy.com/uploads/1/3/2/6/132681066/7502816.pdf
    • http://files.hellojessicaann.com/uploads/1/3/2/8/132815968/tisagevuvufuwago.pdf
    • http://files.myharmonybaptistchurch.org/uploads/1/3/1/8/131857213/580080.pdf
    • http://bopuw.riverlandstuart.com/uploads/1/3/0/7/130776433/9513983.pdf
    • https://cdn.shopify.com/s/files/1/0431/9916/8673/files/60074597816.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/59936307842.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/rugofototadekodeni.pdf
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/35527027630.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/polize.pdf
    • https://cdn.shopify.com/s/files/1/0435/9625/1304/files/43860148147.pdf
    • https://cdn.shopify.com/s/files/1/0433/4839/4142/files/human_lyrics_killers.pdf
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/futupasusukenatofipul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zafon.pdf
    • https://cdn.shopify.com/s/files/1/0430/2598/9785/files/sass_font-_face.pdf
    • https://cdn.shopify.com/s/files/1/0448/6466/7810/files/biochemistry_and_molecular_biology_of_plants_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/1335/6189/files/wudot.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/pexomijoxokajurojiwovawus.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/
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/file

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a6a8.bin
6044ce443fdf6d8dfc8af87a644833892eb8661c5ee76b1cd2efd6e437ab8082
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A8 5160 bytes
font_01_sfnt_off0000b7f6.bin
3f6587a0dc0f4624ffe69f58e215e01c7bf19caaf1c568e4bf4399d7da20dbd5
pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F6 16004 bytes
font_02_sfnt_off0000e8b0.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B0 4324 bytes