Malicious PDF — malware analysis report

Static analysis result for SHA-256 e878c2d3136dd413…

MALICIOUS

PDF

45.2 KB Created: 2020-07-17 16:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e15246aa6b6e3ff8b9c16775a2254ab7 SHA-1: 6a524953a9f67b990bc4bbc6e2ea9d33c580f21f SHA-256: e878c2d3136dd413e2301b9835e62ca2cb3113e9814ac568b7edccb13e3c4ebb
154 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 a malicious redirector link and a large number of external PDF links, indicating a link farm. The primary malicious URL identified is https://ttraff.cc/pify. The document body contains metadata related to wkhtmltopdf, suggesting it was generated programmatically. The sheer volume of outbound links points towards an attempt to distribute malicious content or phish users.

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=more+about+respiration+and+photosynthesis+worksheet+answers
    • http://files.hannahdepree.com/uploads/1/3/0/7/130740318/majiluzefix_vonoxexujamip.pdf
    • http://files.shivabalayogi.ca/uploads/1/3/1/8/131856317/80d9192d763.pdf
    • http://files.eaglespiritacademy.com/uploads/1/3/2/7/132740747/5969528.pdf
    • http://files.trafficcontrolsignrental.com/uploads/1/3/0/7/130776327/1007070.pdf
    • http://files.bellafiorelagottos.com/uploads/1/3/0/7/130776542/3dec942c4ab251.pdf
    • http://files.lakesidelacrosse.com/uploads/1/3/0/7/130775529/e460034.pdf
    • http://files.ecothomasdesigns.com/uploads/1/3/2/3/132302926/7913881.pdf
    • http://files.trafficcontrolsi
    • https://winogozuje.files.wordpress.com/2020/06/galuzoneserinegojiwazax.pdf
    • https://sivegikapa.files.wordpress.com/2020/06/38992018520.pdf
    • https://vupufipa.files.wordpress.com/2020/07/lukogaforovotatikomojig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96672573922.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/dudewisunovurot.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0136/files/gogoxazosubamijawexutafe.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3904/files/gobijepidavimuxaziboteka.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/kejodizuliviniji.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/89232977631.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/fiwuwevegeratuwupijunej.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/94362649472.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_off00007266.bin
8b2ad4ff70c166c9f6858dcbb380eed104840b76cc1b53889e16b78a992d75ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7266 5300 bytes
font_01_sfnt_off00008471.bin
7e61eb99208837f2f5bc7df54dc501e393769bcde034aa3001544b217f7958da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8471 10172 bytes

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