Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ea154c256dd36f…

MALICIOUS

PDF

41.5 KB Created: 2020-08-18 23:11:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfe30d69a544c8affbf5c260cbda458e SHA-1: 2420aa0a7dd983bfc72c4ead26b5f5b28cae2e68 SHA-256: 98ea154c256dd36f0f1408415fe9c2b7682938798efe2721e59db0b28233c699
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 external links, indicating a link farm. The primary malicious URL identified is `https://ttraff.cc/pify?keyword=chocolate+movie+songs++malayalam`, which likely serves as a gateway to further malicious content. The document body contains garbled text but also includes the same malicious URL and several benign-looking Shopify URLs, suggesting an attempt to disguise the malicious intent.

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=chocolate+movie+songs++malayalam
    • http://papedek.karenkaeseartist.com/uploads/1/3/1/4/131406686/6596187.pdf
    • http://tepode.sunriseagcoop.com/uploads/1/3/0/8/130814328/zepij.pdf
    • http://files.parkmeadowhoa.org/uploads/1/3/2/7/132740965/kapewuj-nirumopukirid-nuxesozidafad.pdf
    • http://xivovar.alyssarankin.com/uploads/1/3/1/4/131437425/remag_kilesezonopuru.pdf
    • https://cdn.shopify.com/s/files/1/0433/5783/1326/files/40004027162.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/52385307039.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/xexiniwopi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9857/9879/files/13222380507.pdf
    • https://cdn.shopify.com/s/files/1/0449/9626/4094/files/soil_bearing_capacity_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/muvetu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1348/9319/files/abb_voltage_transformer.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/86892908031.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.pdf
    • https://cdn.shopify.com/s/files/1/0432/4671/5040/files/farifipaxajok.pdf
    • https://cdn.shopify.com/s/files/1/0430/9821/0461/files/fimejamox.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f40.bin
514de9b6c26a5d08788f13ebb63a41fd985a1225bed28da4d045c024e5f86db6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F40 5184 bytes
font_01_sfnt_off000060d2.bin
d00ca700c3d62ff0369bd156799a63c1a81b178d14cf9aab04e6dc9b6ae3c358		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D2 10048 bytes
font_02_sfnt_off0000837c.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x837C 16164 bytes

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