Malicious PDF — malware analysis report

Static analysis result for SHA-256 820a074505d66ae0…

MALICIOUS

PDF

41.6 KB Created: 2020-08-04 23:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a87f0a5ccc12d795bd3dfd21f80c8941 SHA-1: 38e225f3206b88a2b5e4778464ade040ea30d64f SHA-256: 820a074505d66ae041de41bdbcacc0bef7a12d5b1157b0351f7b2deba84ed9cd
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 of which point to a link farm hosted on Shopify. One of these links, https://ttraff.com/pify?keyword=capacitor+100uf+25v+datasheet+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to lure the user to click the malicious link. No scripts were extracted from this sample.

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=capacitor+100uf+25v+datasheet+pdf
    • http://pesosol.roberta-ricci.com/uploads/1/3/2/3/132303374/rirewisofowuzoweje.pdf
    • http://files.ynvuclothing.com/uploads/1/3/2/8/132814276/148183.pdf
    • http://files.sallymckee.com/uploads/1/3/1/4/131453247/vironovefurexubup.pdf
    • https://cdn.shopify.com/s/files/1/0430/4342/2361/files/25206945639.pdf
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/14561887289.pdf
    • https://cdn.shopify.com/s/files/1/0432/1109/6221/files/ximozevasixonazolosamefun.pdf
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/silupibosukufoxikorix.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7475/files/fodoxariwebipajime.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/basel_ii_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6379/files/mozojowuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/delelelex.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6918/files/telapizofiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/3359/8880/files/difumusotid.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3888/files/powixolumape.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27588499931.pdf
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/pathfinder_retraining_feats.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/easy_guitar_sheet_music.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_off00005ac7.bin
a0f2cf4c3eaefc11657642cb432b7d574cb03db919a360b91f908a472d403c3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC7 5628 bytes
font_01_sfnt_off00006df9.bin
98cf5910a2f6508ad279dff9e9884f07833b64c70ce46d655d404c3eca7714de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF9 13720 bytes

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