Malicious PDF — malware analysis report

Static analysis result for SHA-256 0624a53a95cd0a84…

MALICIOUS

PDF

51.9 KB Created: 2020-08-05 00:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95fa2a936d25a2a88b427f19d4bd5d45 SHA-1: 35e076705c6d18e71a8c06cab42fb315c2a71469 SHA-256: 0624a53a95cd0a8444d316662e889c7502c819a81539087c1082421ad318c22d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.com/pify?keyword=affairs+cloud+current+affairs+pdf+august+2020`. This indicates the document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

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=affairs+cloud+current+affairs+pdf+august+2020
    • http://files.abbigailrichardsmakeup.co.uk/uploads/1/3/1/0/131070711/3051543.pdf
    • http://files.noestansolos.org/uploads/1/3/1/3/131383953/purutadamurexiwal.pdf
    • http://files.jymdesigns.com/uploads/1/3/0/8/130813448/leraragujex_posurusanax_refizuf_wagulokamodo.pdf
    • http://files.gardenspotrentals.net/uploads/1/3/2/6/132681938/finefenusavat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0490/3073/files/varizedo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/lidupifekog.pdf
    • https://cdn.shopify.com/s/files/1/0431/2236/0469/files/evermore_alyson_noel.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9512/files/xupetavufatira.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1558/files/besiw.pdf
    • https://cdn.shopify.com/s/files/1/0439/7400/0798/files/jizolagerogaguwujeral.pdf
    • https://cdn.shopify.com/s/files/1/0440/8829/5576/files/96976547686.pdf
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/sks_ak_mag_conversion.pdf
    • https://cdn.shopify.com/s/files/1/0438/2166/2365/files/87554064949.pdf
    • https://cdn.shopify.com/s/files/1/0431/9245/1232/files/zemasijodexe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0378/8959/files/lucky_britney_spears_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/8803/6505/files/richard_dawkins_ancestor_s_tale.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b71.bin
28dbe84eb3f9e0b2be250aa286f313e26bd898e2fb129d35de16df843cba064e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B71 5584 bytes
font_01_sfnt_off00009e87.bin
0f26758ae4172259b0025c7b0e5b57ea5195c53da0a2d41f16f77e58bf0d7adf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E87 10608 bytes

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