Malicious PDF — malware analysis report

Static analysis result for SHA-256 82e4998348fc19ae…

MALICIOUS

PDF

37.8 KB Created: 2020-08-15 08:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db5ce5b602f93ab36b7b8300bbabe923 SHA-1: 2a29a245256f161c481b4d9ed88bb75544311ff1 SHA-256: 82e4998348fc19ae4ea8a9d602e6f82519ef05677c81cbd2130e2aefa578db6b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic, potentially leading to malicious sites or further malware downloads. No scripts were extracted, limiting the analysis of direct execution behavior.

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=bosch+bme680+datasheet
    • http://files.tiadaghtonvalleyrr.com/uploads/1/3/1/3/131380008/6993a.pdf
    • http://files.actforveterans.org/uploads/1/3/1/4/131455621/33456.pdf
    • http://bokojabix.howtomakemerich.com/uploads/1/3/1/4/131453540/6be92c80.pdf
    • http://files.raygalleryny.com/uploads/1/3/2/6/132682303/888b34f46c0af9.pdf
    • http://files.juniorbisonhockeyclub.com/uploads/1/3/2/7/132740399/bolokikutenuma.pdf
    • https://cdn.shopify.com/s/files/1/0429/1251/4201/files/tanixerebikowu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8530/7808/files/graphing_equations_and_inequalities.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6217/files/john_deere_1070_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7655/files/gazelle_freestyle_elite.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/fezokomegul.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/6413321228.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/cancer_de_prostata_articulo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4803/2673/files/portal_2_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0434/0046/2501/files/jizeguwawaromaka.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/photoshop_3d_text_effects_tutorials_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/wosuziwojobifugamez.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/diagnosis_and_treatment_of_diabetes_mellitus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.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_off00005472.bin
04885fcfe0a5cc4dc129bad68f3e78f929758d3f9cfa719c1e331338b0b4f2b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5472 5732 bytes
font_01_sfnt_off000067bd.bin
25440d7b8296d7c961233bb11654cca09e9e0d6661c517aaac66a89511c80597		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BD 10148 bytes

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