Malicious PDF — malware analysis report

Static analysis result for SHA-256 db5e887dce9a4c4a…

MALICIOUS

PDF

60.8 KB Created: 2020-08-29 22:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fc52d9b67fb4b5d819e30071f35b447 SHA-1: a130621b6e2de14b94f7563af8ebd52224c7870c SHA-256: db5e887dce9a4c4af0987e66230c453ef8f818b7d027bce82a4658871903b930
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=python+programming+pdf+myanmar', which is likely the initial lure. The presence of a large number of external PDF links, many pointing to Shopify, suggests a link farm designed to obscure the malicious redirector.

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/wix?keyword=python+programming+pdf+myanmar
    • https://cdn.shopify.com/s/files/1/0431/2537/5127/files/algorithm_design_and_analysis_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/1094/8254/files/67145162810.pdf
    • https://cdn.shopify.com/s/files/1/0429/8620/9443/files/bomberman_rom_nes.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/bhakti_movement_and_sufism.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/vavizabogexitofepopele.pdf
    • https://cdn.shopify.com/s/files/1/0433/0366/5822/files/gedanaguxokotanenu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/xasorelowalanofije.pdf
    • https://cdn.shopify.com/s/files/1/0435/5332/5224/files/fl_studio_11_full_crack.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/alpsankhyak_form_mp.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/guwumene.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/79090512153.pdf
    • https://cdn.shopify.com/s/files/1/0429/0428/9439/files/rumititabisememef.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/9345263424.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d04.bin
d1213fea2f52556a2fba4f8e248f110c38b55bd79fd90675ef2a0b6fc792691a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D04 5348 bytes
font_01_sfnt_off00007f09.bin
49857f1d79ef8646114a1cf1e01616adbf42f330fb97afba0511ef4a3a13ed02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F09 15124 bytes
font_02_sfnt_off0000addf.bin
9ed13a5f77d6a21e28548c47c81e58a18a0eaa81b82dc7488e8e9cc31087dbd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADDF 16436 bytes
font_03_sfnt_off0000c420.bin
642cf34ec3f1228fb7f82677c9e849e0a061c6517ed0d20ba09a4b09b16d41ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC420 10828 bytes

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