Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb2f07b138acee3…

MALICIOUS

PDF

43.5 KB Created: 2020-08-06 14:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3054b34c526c1f9bd42cddea2b605e8 SHA-1: e2b79a6d4f84d631c14f90472f35afcf766a49f3 SHA-256: 9bb2f07b138acee3fbadc82baa01a0be5c019cd92dab16f87b0d0831c0c7d6c2
152 Risk Score

Malware Insights

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

The PDF contains a deceptive lure for a "job application letter pdf free download" to trick users into clicking a link. This link redirects to a malicious infrastructure at ttraff.com, indicating a phishing or scam attempt. The document also hosts a large number of external PDF links, likely for SEO manipulation or to distribute further malicious content.

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=job+application+letter+pdf+free+download
    • http://files.jessiejewelsart.com/uploads/1/3/0/7/130776142/54b8bf.pdf
    • http://files.dreyfus-emerson.com/uploads/1/3/2/6/132696111/nopuxadodatunapom.pdf
    • http://files.yeehaw4running.com/uploads/1/3/0/8/130813550/mixuwaj.pdf
    • http://files.jlbpsychology.com/uploads/1/3/2/6/132682745/jirover_bafoja_fenosakido.pdf
    • http://files.rockwehrmann.com/uploads/1/3/0/7/130738848/kigowizexizamujapi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/porixojatagewesag.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9347/files/albert_bandura_social_learning_theory.pdf
    • https://cdn.shopify.com/s/files/1/0438/4754/9088/files/buffer_solution_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8340/files/john_deere_gx75_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/1932/7896/files/global_advertising_strategies.pdf
    • https://cdn.shopify.com/s/files/1/0434/7563/2285/files/soramobamud.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/best_launch_options_for_csgo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4845/0718/files/las_vegas_aviators_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/verekoguwoporirinalawod.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/lujusijidixolujigu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/38951582638.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1460/files/49558542293.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/56297716303.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_off00006af5.bin
ee43501816ced9e2cb3744ed0f18d885fd2dd79a947893ca4961b700e6bac43d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF5 5192 bytes
font_01_sfnt_off00007cc0.bin
10c0135d3f4cb24bbdee0f1461f983516561e55d49934e26ac9af717bfa4e334		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC0 10456 bytes

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