Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d31120d44384fc8…

MALICIOUS

PDF

34.7 KB Created: 2020-08-16 20:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bbec1c8a3ef4de9fea2daf2655d347b SHA-1: 0a76f9a4b39bfe056171d868ce88e77691a8634a SHA-256: 0d31120d44384fc8b678eb3ebb16877da4a56f0c9ce9444bf39aa3b691573c0a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, contains a URL that appears to be a lure for game-related information, likely to trick users into clicking malicious links. The ML classifier also strongly indicated maliciousness.

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=swgoh+darth+revan+gear+list+spreadsheet
    • http://nizedegi.panoramicgalaxy.com/uploads/1/3/2/6/132681670/rudaguno.pdf
    • http://files.bostonareamaskinitiative.com/uploads/1/3/1/4/131437941/36468593beb3f56.pdf
    • http://suvax.anthonyhehir.com/uploads/1/3/0/7/130776433/6361511.pdf
    • http://files.spolarandassociatesltd.com/uploads/1/3/1/4/131437246/ad1887fab21.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/6488/3355/files/51993852091.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/fosasuzesa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/87106307722.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/70889893948.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6636/files/koladibokosurunus.pdf
    • https://cdn.shopify.com/s/files/1/0431/8940/3810/files/dabuwudakunuwib.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0049/files/chava_kadambari_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6418/8312/files/41163727067.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7822/files/lefekagavetedufeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0354/files/javascript_static_variable.pdf
    • https://cdn.shopify.com/s/files/1/0437/6274/5501/files/tonuzam.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7137/files/50053837623.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7913/files/guxid.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/rango_de_movilidad_articular_pdf.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_off00004a5d.bin
f0772fcbf1b33cd82cb240ac9c7b61bbe9911daf57c715a3d2895f0a0cb5096c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A5D 5476 bytes
font_01_sfnt_off00005d0a.bin
1f8576e1ab2189ec9b54bb1986a363ca9422c5ca2946c2a2ba4ec168de8e7d3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0A 9520 bytes

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