Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c0bfcbf819ab177…

MALICIOUS

PDF

44.7 KB Created: 2020-08-14 06:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d67fafccc148daa7a84fc08a39e721bf SHA-1: 87e98abbc64f712f9fe3a7475ca5fd7d31c786fc SHA-256: 4c0bfcbf819ab17750961481de3a6f14342391d658a5df607e02273ac78e781b
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a 'Fodmap diet sheet nhs'. This indicates a social engineering attempt to trick the user into visiting a malicious site. The PDF also hosts a large number of external links, many pointing to Shopify, suggesting a link farm for SEO manipulation or to obscure the final malicious destination. No scripts were extracted, but the primary attack vector is the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=fodmap+diet+sheet+nhs
    • http://files.macombcountyretirees.com/uploads/1/3/1/6/131636689/zesubekavaxikem.pdf
    • http://dobumini.simplyhooked.co/uploads/1/3/1/8/131856713/mirarugegato.pdf
    • http://files.gollychickens.com/uploads/1/3/2/6/132681307/rilegor-tedaruwos-fabavu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/32533413495.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/bible_translations_chart.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/5411/1656/files/ligadura_de_cordon_umbilical.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/arduino_math_library.pdf
    • https://cdn.shopify.com/s/files/1/0434/1284/8790/files/direct_and_indirect_coombs_test.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tanedikefiresemur.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/nojas.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3133/files/44674434107.pdf
    • https://cdn.shopify.com/s/files/1/0435/7704/9247/files/nebomigemimakufipivus.pdf
    • https://cdn.shopify.com/s/files/1/0441/2506/1272/files/dnd_players_handbook_2.pdf
    • https://cdn.shopify.com/s/files/1/0432/4058/7423/files/nitric_oxide_foods.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9652/files/megagupuvawavolu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7007/8617/files/89040923313.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_off000070d4.bin
00ed93316e3f33a4cddfaa065d06bd13280eeb460a357b08e01af525a8735596		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D4 5028 bytes
font_01_sfnt_off000081d2.bin
fdd6a1db1f0197cc86b574eaa25043d05060522088808dfc6c8f7a4b39b468ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81D2 11172 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.