Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b9dae1f271bcc4…

MALICIOUS

PDF

50.9 KB Created: 2020-07-28 11:20:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a12c7b65656c1976a45003cc46b32ce4 SHA-1: d6879583d80482afa4942928bd594ee67cfd7f76 SHA-256: d9b9dae1f271bcc4ac5541321631aae1e5ad5afcf68d7ed981456df8c29605b1
136 Risk Score

Malware Insights

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

The PDF file contains a lure related to academic dates, likely to entice users to click on embedded links. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK firing indicates that the primary embedded URL, 'https://ttraff.cc/pify?keyword=ignou+revised+date+sheet+december+2019', leads to malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic suggests a large number of embedded links, with the first being 'https://cdn.shopify.com/s/files/1/0428/8148/2919/files/82370048701.pdf', which is likely part of a link farm to obscure the final destination.

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ignou+revised+date+sheet+december+2019
    • http://files.thedecalshopcanada.com/uploads/1/3/0/9/130969150/godugopomorar.pdf
    • http://files.faithandfriendsinc.org/uploads/1/3/1/6/131636916/vezatek_wokajatijupifik_getegubebalawa_mageroru.pdf
    • http://files.larosegc.com/uploads/1/3/1/4/131438211/4837902.pdf
    • http://files.aquacleanwi.com/uploads/1/3/0/7/130776728/8531168.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/82370048701.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/juxumadebamapetutorobegew.pdf
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/55907389077.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sitomomuwarusubewikujo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/48544278644.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/50770763630.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/batixapef.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/zewenakapilewex.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/12114288440.pdf
    • https://cdn.shopify.com/s/files/1/0433/5032/7451/files/33956527482.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3970/files/nivan.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_off00007e5e.bin
2abe7d93d2c397095954df8b30e61f30bb558f20b34cbb371765d2641bf84c4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5E 5820 bytes
font_01_sfnt_off000091fe.bin
13678a14b930e6d42e11b2ac41b13981c2c7f5938cc30cfb194ad51886f1f1dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91FE 2092 bytes
font_02_sfnt_off00009ba2.bin
0ad4bdaa5d934a54cb35a24cb5adf43c757376acc619406c1d67826dea59abb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA2 9992 bytes

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