Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e19594910a437f2…

MALICIOUS

PDF

42.7 KB Created: 2020-08-07 04:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7afe3e6ece7d27affb58863c3a1f8930 SHA-1: 9de59b2dba6a3d888cf2a445a59a9835bc8e847b SHA-256: 5e19594910a437f253252256e89ef9e55750a34d21a8bc3ce272bbe21adf4aa2
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a primary link pointing to a known malicious redirector. The document body, though obfuscated, contains text that appears to be a lure for a 'budget report sample'. The presence of many external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or redirection attack.

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.ru/pify?keyword=budget+report+sample+pdf
    • http://files.jhillpropertymanagementllc.com/uploads/1/3/2/7/132740905/jegabujime.pdf
    • http://gexopufom.buildingtheportugueseempire.org/uploads/1/3/1/3/131383314/6876893.pdf
    • http://sipugo.epiphanyscoop.com/uploads/1/3/2/6/132681947/4077192.pdf
    • http://files.hermonpresbyterian.org/uploads/1/3/2/8/132815791/tekewijezuv_foninasobup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/pajuxazejewerunolafili.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/63613711253.pdf
    • https://cdn.shopify.com/s/files/1/0434/0409/9735/files/sindrome_de_asperger.pdf
    • https://cdn.shopify.com/s/files/1/0430/7491/2410/files/lewopikokew.pdf
    • https://cdn.shopify.com/s/files/1/0437/6464/6040/files/200-_120_ccna.pdf
    • https://cdn.shopify.com/s/files/1/0435/2737/2955/files/jizululilemot.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/81075763780.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/8635468650.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/gujelobaxobazim.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/wurokewoxedudojunadex.pdf
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/6819262106.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/fibebitaju.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3929/files/nozowizijobodimoxuwibuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/zofanudodudeb.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_off0000688e.bin
f2d8a2cfdbe61189a4ed270293d09aaa22f08563a80e6ae169c642db9e2dffb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x688E 5408 bytes
font_01_sfnt_off00007ae1.bin
0f2ea150657b67bbba4d5cca79b682e75499b4930f210ff4d5f4187128c9f2c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE1 10228 bytes

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