Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68027e941c78288…

MALICIOUS

PDF

45.5 KB Created: 2020-08-21 14:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3f8d2410f6d42e71b640ed304fd4655 SHA-1: 47345fd7f87f1feffdec44291d4e926220aeed78 SHA-256: f68027e941c7828810bd39af0f540027ffcda411243cab9cfeff52980d0964af
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains a URL that matches the redirector link found in the heuristics, suggesting a lure to external content. The primary malicious activity appears to be the distribution of links pointing to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/pify?keyword=aalayal+thara+venam+lyrics+in+malayalam
    • http://files.littleoasis.co.nz/uploads/1/3/1/3/131398547/b557d59ad24.pdf
    • http://zudefik.satxinspector.com/uploads/1/3/0/8/130814070/1419345.pdf
    • http://files.innerdolphinawakening.com/uploads/1/3/1/6/131606035/kumuvefajolen.pdf
    • http://pejix.jornalizem.com/uploads/1/3/0/8/130814328/zegatevajidakir.pdf
    • https://cdn.shopify.com/s/files/1/0434/8549/5453/files/sumoxuxipexuwezadafalus.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/beruputezetuweredujabumar.pdf
    • https://cdn.shopify.com/s/files/1/0443/4444/3036/files/energia_eolica_en_el_peru.pdf
    • https://cdn.shopify.com/s/files/1/0447/5686/1077/files/facts_about_poseidon.pdf
    • https://cdn.shopify.com/s/files/1/0455/7858/4229/files/invitation_templates_for_sport_event.pdf
    • https://cdn.shopify.com/s/files/1/0431/4634/6658/files/bufosikupabakalirunapef.pdf
    • https://cdn.shopify.com/s/files/1/0447/5600/9111/files/miseruludure.pdf
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/tevadosupiju.pdf
    • https://cdn.shopify.com/s/files/1/0434/7871/2472/files/37844778936.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62654677968.pdf
    • https://cdn.shopify.com/s/files/1/0431/2743/9526/files/xopomifekupalibalopopo.pdf
    • https://cdn.shopify.com/s/files/1/0427/4552/8487/files/how_to_become_a_fluent_english_speaker.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
stream_004_off000067a1.bin
b633aff07cd2d06a854df05d22dc461aa408653ee506457154b45377f91ab4e5
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x67A1 9172 bytes
font_00_sfnt_off0000562c.bin
5e79fcaa2cebff150764f09e211cbe7a37604ff87b078a91e868a532e4414f95
pdf-font-stream PDF embedded font (sfnt) at offset 0x562C 5188 bytes
font_02_sfnt_off000086c9.bin
53152857fb6ce6fc91d49510d9efbf7a81821ab4d1a4693ceaa8baa61789c195
pdf-font-stream PDF embedded font (sfnt) at offset 0x86C9 9868 bytes