Malicious PDF — malware analysis report

Static analysis result for SHA-256 c74b7847dc150004…

MALICIOUS

PDF

45.6 KB Created: 2020-08-08 18:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34b7fc9101e54c20c4c6f2212b62956c SHA-1: c5759d0437e4ae163e69e051a98fd3fdfa2506f4 SHA-256: c74b7847dc15000483e7673742fd71aec71066e7af49535f51e77034f5534058
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 external resources. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that at least one of these links, https://ttraff.cc/pify?keyword=aeroponics+system+pdf, leads to known malicious redirector infrastructure. The PDF_SEO_LINK_FARM heuristic further suggests a deliberate attempt to create a link farm. The ML classifier also strongly flagged this PDF as malicious. The combination of these factors points to a malicious PDF designed to lure users to harmful sites.

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=aeroponics+system+pdf
    • http://nuwugisa.nimblehillbrewing.com/uploads/1/3/1/0/131069839/727960.pdf
    • http://firumiseg.amfccl.com/uploads/1/3/1/8/131871390/wevemijutobufobebi.pdf
    • http://files.monteschoenstatt.org/uploads/1/3/1/3/131380210/bokiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8560/2721/files/48520570750.pdf
    • https://cdn.shopify.com/s/files/1/0432/7335/5424/files/46170324327.pdf
    • https://cdn.shopify.com/s/files/1/0438/3395/0358/files/free_translation_of_from_spanish_to_english.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/rawufopepawexujanala.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/komibirekimof.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/schistosomiasis_symptoms.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/58384471779.pdf
    • https://cdn.shopify.com/s/files/1/0437/5976/3617/files/endodontics_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/76050795975.pdf
    • https://cdn.shopify.com/s/files/1/0440/7758/0453/files/dental_hygiene_cover_letters.pdf
    • https://cdn.shopify.com/s/files/1/0430/8316/9943/files/weather_in_taos_nm.pdf
    • https://cdn.shopify.com/s/files/1/0428/2987/3318/files/content_strategy_for_the_web.pdf
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/bamedixesanilaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1960/files/figubudolaz.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_off000074dc.bin
f43c0bad585fddfd476d47d64cc733d11738c5856c2b1cbfef34fe9aeeca2061		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74DC 5152 bytes
font_01_sfnt_off0000865b.bin
e385b4b549ddffcaa5ac2f11423e6ce4529810802bf4578e6b7b63f06ec21655		 pdf-font-stream PDF embedded font (sfnt) at offset 0x865B 10184 bytes

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