Malicious PDF — malware analysis report

Static analysis result for SHA-256 453164b195f50755…

MALICIOUS

PDF

41.4 KB Created: 2020-08-07 09:39:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ae072cacef669fd06a30bb45ec37af5 SHA-1: bfa16f9a26849ba09c3b21b906976a55e1f249c7 SHA-256: 453164b195f50755516ba9c88b1ad48812208e53e0dd250a27dbeebbdabac636
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to domains associated with SEO link farms. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is used to obscure the final destination. The document body, though partially corrupted, contains the text 'Area of right triangle worksheet pdf' and the malicious URL, suggesting a lure to trick users into downloading potentially harmful content disguised as educational material. The presence of numerous Shopify-hosted links, some confirmed benign and others unknown, indicates an attempt to blend malicious links with legitimate-looking ones.

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=area+of+right+triangle+worksheet+pdf
    • http://kezeron.missraesroom.com/uploads/1/3/0/7/130775607/madabupomirazofoma.pdf
    • http://files.hellenphotography.com/uploads/1/3/0/7/130776131/1669426.pdf
    • http://titama.floridakeysoceangallery.com/uploads/1/3/2/6/132681352/44d1a1ed2.pdf
    • http://files.parlorartgallery.com/uploads/1/3/0/9/130969190/3100531.pdf
    • http://files.feedmysheeptemple.org/uploads/1/3/0/7/130739517/bewuseno.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/66893903431.pdf
    • https://cdn.shopify.com/s/files/1/0437/4803/2666/files/27462307263.pdf
    • https://cdn.shopify.com/s/files/1/0438/4486/2114/files/visual_studio_2017_enterprise_key.pdf
    • https://cdn.shopify.com/s/files/1/0436/2174/4803/files/rotanuruwadamanilux.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/97817476430.pdf
    • https://cdn.shopify.com/s/files/1/0433/6772/7269/files/53866549059.pdf
    • https://cdn.shopify.com/s/files/1/0429/2490/0515/files/munonegadorebufafezujo.pdf
    • https://cdn.shopify.com/s/files/1/0436/7004/4825/files/deficiencia_de_aldolasa_b.pdf
    • https://cdn.shopify.com/s/files/1/0434/3313/2184/files/96272619815.pdf
    • https://cdn.shopify.com/s/files/1/0433/2145/8853/files/17159563155.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5191/files/all_antonyms_list.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_off000063a3.bin
df653f21aa21632d365626833849f498bd895f4d1966338fbbc0f4615aefee34
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A3 5448 bytes
font_01_sfnt_off0000763d.bin
e99b3ae3fda04e6dfb9f64c04c67368d008ec9560b4664c56b03d7475980ddef
pdf-font-stream PDF embedded font (sfnt) at offset 0x763D 10132 bytes