Malicious PDF — malware analysis report

Static analysis result for SHA-256 1533f5f3f84de5c6…

MALICIOUS

PDF

60.0 KB Created: 2020-08-12 08:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24dad293d811e24019e3976c6ee26ec6 SHA-1: 3669f26ef54d137bed11b69072d0c260433baf75 SHA-256: 1533f5f3f84de5c61c9e1f104033b4fd8bc407ef9be39a79e39d8c1de073aaa3
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, mentions 'Amharic dictionary pdf' and includes a URL that appears to be part of a link farm designed to attract traffic. The presence of multiple Shopify URLs suggests an attempt to disguise the malicious infrastructure within seemingly legitimate hosting services.

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.com/pify?keyword=amharic+dictionary+pdf
    • http://vumuk.jeffbeatman.com/uploads/1/3/0/9/130968984/33e1e44d4.pdf
    • http://files.sixdegreeswriter.com/uploads/1/3/0/9/130969885/bimasi_nipebapunog.pdf
    • http://files.georgetownnewcomers.com/uploads/1/3/1/4/131483386/dada360c7116.pdf
    • http://files.ekk-electric.dk/uploads/1/3/1/4/131407492/desidarejo-vefojumerenoziv-boratuvomatowar-lupemegedabofi.pdf
    • http://files.greengallerync.com/uploads/1/3/1/4/131437457/tesedenebilazutojefe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/mituzolewiba.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/ctet_ans_key_july_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/8501/2900/files/bankable_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/7440190725.pdf
    • https://cdn.shopify.com/s/files/1/0438/1379/8050/files/nupipesuvulasa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9513/0266/files/wexitenugozazimolifojonak.pdf
    • https://cdn.shopify.com/s/files/1/0434/7081/5397/files/88278128916.pdf
    • https://cdn.shopify.com/s/files/1/0435/7790/1214/files/70910799613.pdf
    • https://cdn.shopify.com/s/files/1/0428/9200/1433/files/book_of_azathoth_tarot.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1382/files/mignonne_allons_voir_si_la_rose_hatier.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/rigibozebuladalofinerusas.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/boxoxujivig.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bff.bin
ecbdd00b317a743b62f739150ad634cf8055f7ef78dfa98322733116574730f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFF 24376 bytes
font_01_sfnt_off0000ad77.bin
ee95612dcf713791f3f5e25d498f255b32646c1b0706b362879910bff3b42115		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD77 5276 bytes
font_02_sfnt_off0000bf41.bin
55213eaacba41e96a09e5ae69ea3035849b7fde39333bdd3981392d7f8c3cd66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF41 10276 bytes

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