Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab65659163a973c9…

MALICIOUS

PDF

45.3 KB Created: 2020-08-09 22:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b50668e0972fd5571303266771f02112 SHA-1: 47b9750a6b88c6af891c5b3fe1c32009d034c2a9 SHA-256: ab65659163a973c999517e2545a0224f913fb0604f859951790f3a71c67a2bca
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is further supported by the presence of a large number of external PDF links, indicating a link farm. The document body, though corrupted, contains text suggesting a lure for a 'Cambridge dictionary download'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=cambridge+dictionary+download+pdf
    • http://mijikiwap.dashkaroth.com/uploads/1/3/0/7/130776499/4473823.pdf
    • http://files.wathsportsfan.com/uploads/1/3/1/3/131398221/166e7e48c.pdf
    • http://files.bhpfineminiatures.com/uploads/1/3/1/4/131453651/korokebigetume.pdf
    • http://files.claysmithcreativesltd.com/uploads/1/3/2/6/132695832/sonepaf.pdf
    • http://radakeze.hvswug.org/uploads/1/3/0/8/130874276/nobexiwite_sigibamunode_fazisuboraru.pdf
    • https://cdn.shopify.com/s/files/1/0428/4825/6156/files/fizokisifoledawikimoxokul.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8656/files/zoman.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/90319675082.pdf
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/54404369830.pdf
    • https://cdn.shopify.com/s/files/1/0435/6797/2513/files/71925143121.pdf
    • https://cdn.shopify.com/s/files/1/0432/0326/4667/files/jezefixe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58933331969.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/zuzub.pdf
    • https://cdn.shopify.com/s/files/1/0435/8920/6174/files/lojebijijedokijuzakede.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/paxotaxazojulilinitulo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7810/7811/files/almost_is_never_enough_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/0183/9775/files/tamubalokupul.pdf
    • https://cdn.shopify.com/s/files/1/0440/7607/3125/files/53117806537.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000643b.bin
74771eb71e6e03a8dc7b88c57434e4af5712947983d79a6f4445c8e514be1e7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x643B 5444 bytes
font_01_sfnt_off000076bf.bin
bca3cb1b69cf40684dbaf89fd777e47a363a28b4d5fc597a804460d1f6cb643e
pdf-font-stream PDF embedded font (sfnt) at offset 0x76BF 10372 bytes
font_02_sfnt_off00009a3a.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A3A 4324 bytes