Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddedbd3969265840…

MALICIOUS

PDF

113.3 KB Created: 2020-08-13 21:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d830bbb8e57930ad1671978fcad2b621 SHA-1: a9e5db56bf1e7782fae5e97bcfd27de5217461ae SHA-256: ddedbd39692658405496ea07b01f08a5c603f17279b0a1e78012e921e1e7d2e4
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded links, suggesting a link farm or SEO poisoning attack. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=transformers+4+bumblebee+car', which is likely used to redirect users to further malicious content. The document body contains garbled text and a URL, but no clear narrative. The ML classifier strongly supports the malicious verdict.

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=transformers+4+bumblebee+car
    • http://files.jvroofingsiding.com/uploads/1/3/0/8/130813111/fakelifamerazazawox.pdf
    • http://gosaj.tranquilkneadz.com/uploads/1/3/1/4/131453215/7812410.pdf
    • http://files.greenvilletrackclub.com/uploads/1/3/0/7/130738875/bidobesewubev_manajiveb_xonir_rozexaxe.pdf
    • https://cdn.shopify.com/s/files/1/0435/1030/0831/files/string_compare_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0437/5019/5354/files/dinamalar_today_newspaper_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2339/files/kosovekutalilerozukezasej.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/salmonella_bacteria.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/nature_and_scope_of_business_ethics.pdf
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/tebosewokorotezev.pdf
    • https://cdn.shopify.com/s/files/1/0432/2761/1295/files/ziwivulorimukulota.pdf
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/najazuzodemuzufiwew.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0067/files/dorikuminisumen.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/tegivo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1939/3448/files/27318680501.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/japoxotoruzub.pdf
    • https://cdn.shopify.com/s/files/1/0439/4647/5678/files/26442253544.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tedogunugovosilogupex.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_off00017e59.bin
f7eac42877c0d9273d81c9c27211096511a08f934368dea2f0efb7af54f13c6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17E59 5204 bytes
font_01_sfnt_off00018ff8.bin
ee66f0af03c5c8c8d9178fa87ceca8ac54c8ac347472f0ef18cc61e178f4dc51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18FF8 11848 bytes

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