Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ef847ed9d68107…

MALICIOUS

PDF

42.3 KB Created: 2020-08-07 19:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfc9f8b258d5be177eeb925ba7e236ec SHA-1: 69a2c3cea927b3b67210e18c0492fb960127da25 SHA-256: d6ef847ed9d68107605afbf68c804bab26160a64ae48a4e9a981eafd6ce4c936
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=carburetor+manufacturing+process+pdf', is identified as a malicious redirector. This suggests the document is designed to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

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=carburetor+manufacturing+process+pdf
    • http://files.roy-ong.com/uploads/1/3/1/1/131163859/e1ed86.pdf
    • http://tivuwefu.nonstopinterior.com/uploads/1/3/1/4/131453109/45cbea89b0.pdf
    • http://files.agathafashion.shop/uploads/1/3/0/9/130969375/9654079.pdf
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/conduction_heat_transfer_equation.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/temavisivomikabasibo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9044/4445/files/wetekipalumofi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3006/9927/files/kaxanul.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/mexodoru.pdf
    • https://cdn.shopify.com/s/files/1/0434/3247/6838/files/31761601144.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9768/files/tosuxewuxanar.pdf
    • https://cdn.shopify.com/s/files/1/0429/5245/8396/files/casel_wheel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sexewagufik.pdf
    • https://cdn.shopify.com/s/files/1/0433/7814/7491/files/39142126188.pdf
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/4450464240.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/dirafubavaririvu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/gmp_requirements_for_labeling.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_off00006852.bin
8e09ebdc9610681e07bd94558b6f976e3d0c419481899c3bd8e9487278f1703a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6852 5488 bytes
font_01_sfnt_off00007adf.bin
25b81d7f7019398844e8d20831971c1b8c89e783dd4a5dcae2f1fb6175011725
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADF 9796 bytes