Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b42fde51c057018…

MALICIOUS

PDF

88.0 KB Created: 2020-08-04 02:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 410c876a269a45c1ac6858c7a021caa0 SHA-1: 80f64b6ccea2204310cd1c14422cb3ca95067b76 SHA-256: 7b42fde51c057018a10544665313f973e56cb596746089492620536a0c4ca5f8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high number of links to external PDFs, many of which are hosted on domains that appear to be part of a link farm. One of the primary links directs to a known malicious redirector, suggesting an attempt to lead the user to malicious content. The ML classifier also strongly indicated maliciousness.

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=define+human+development+index+pdf
    • http://files.belladonnamythics.org/uploads/1/3/0/7/130739239/dezisom-tigujuti-dudixavumuwabi.pdf
    • http://files.aerithe.com/uploads/1/3/0/8/130814298/9706269.pdf
    • http://files.alihillart.com/uploads/1/3/0/7/130740433/barowa.pdf
    • http://files.rosedaleshakespeare.com/uploads/1/3/1/3/131384127/genatokejafedevob.pdf
    • http://dajix.liquorburn.com/uploads/1/3/1/8/131856462/petawogezozazekuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8076/2023/files/23358445599.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0081/files/buzatoguvimenubodivomej.pdf
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/32965383450.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/mojikifavolefibomutiri.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/62264683092.pdf
    • https://cdn.shopify.com/s/files/1/0440/0067/3950/files/jimineruk.pdf
    • https://cdn.shopify.com/s/files/1/0438/5921/4501/files/salozubizimitopinoji.pdf
    • https://cdn.shopify.com/s/files/1/0440/1407/6069/files/70044790469.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46946939033.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/8537517908.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0872/files/41526455301.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/17716211898.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3199/files/14008614414.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e44b.bin
1c53608c6bf24a318ee1cbcc65f5886f0aeaf552b41b7dacf9fad30291bf0239		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE44B 5688 bytes
font_01_sfnt_off0000f7d9.bin
43acdf1479e4b60805aa56c309f74d7f3dfb2599944d678c85fe6e3758a8e5af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D9 5132 bytes
font_02_sfnt_off0001093c.bin
dea7bb798c2da0b6023af0d51cb694460cc43c74840d8ab71e3e8bf6c5c650a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1093C 16656 bytes
font_03_sfnt_off00013d03.bin
1396562ca3b520584892f4bd50ff39b0722e014cdbc1625119a677b71e1270af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D03 16064 bytes

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