Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6eb7727b65f3c88…

MALICIOUS

PDF

44.4 KB Created: 2020-08-15 07:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89192afed1f2f76f912e1bc2288aaec1 SHA-1: c6e8ffb85cc42c4a26abd8d65c02e68c9c45010c SHA-256: a6eb7727b65f3c88bf4fcae085db3e23b8aa7dadf63cebf1ea6a4a2dac357368
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains the same malicious URL. This suggests the primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

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.ru/pify?keyword=bacillus+anthracis+caracteristicas+pdf
    • http://files.thechurchtaxexpertsofamericallc.com/uploads/1/3/2/6/132682327/76355.pdf
    • http://fadago.soeasyofficial.com/uploads/1/3/1/0/131070450/wisufe.pdf
    • http://fuwanu.hmjassociates.com/uploads/1/3/1/4/131407164/roxivuvidomopeb-duwivawifuni-wagep.pdf
    • http://files.sbrfln.com/uploads/1/3/1/4/131453193/lemujozuros.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/11043470158.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/52286743448.pdf
    • https://cdn.shopify.com/s/files/1/0431/1518/4277/files/nakaliwotisem.pdf
    • https://cdn.shopify.com/s/files/1/0433/4200/4375/files/the_bettencourt_affair.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/99296573959.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5299/files/fap_titans_cheat.pdf
    • https://cdn.shopify.com/s/files/1/0434/6658/8325/files/underground_concrete_water_tank_design.pdf
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/making_love_out_of_nothing_at_all_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/wadubenovo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zaduvezumutup.pdf
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/raputefigobagaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6641/6534/files/3rd_grade_math_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/lipomusopanova.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_off00006fcb.bin
a7f17e42f59c4b0322e71e9c3fc64983ba2fe125bf129b1dffd3f569912f3a69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCB 5292 bytes
font_01_sfnt_off000081b8.bin
689f08a202cc1945f38a3b8a1763da016d54823fce4c1c66bdb72d11f3467c42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B8 10140 bytes

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