Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e756e1263de207…

MALICIOUS

PDF

52.5 KB Authoring application: Mobipocket Creator First seen: 2020-09-04
MD5: 57d7cec2d1a4f313b00b54107fbcff69 SHA-1: 0c2453bafc1c6dd6c2b22a02dc242a01e6727487 SHA-256: c1e756e1263de207086a867c57009a059f23d497d7d90b55f49b4fabedade991
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection of 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further suggests malicious intent, likely related to phishing or traffic redirection. The document body itself contains garbled text mixed with some URLs, reinforcing the link-farming behavior. The primary attack pattern involves directing users to a multitude of external PDF files hosted across various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://marriagecelebranthilaryvaneldik.com/uploads/1/3/0/3/130323425/banubijimeb.pdf In PDF document text
    • http://gav.epay-clientesv3-0range.com/uploads/2020/01/27/banafu.pdfIn PDF document text
    • http://intrenet.pro/uploads/2020/01/29/194494d974.pdfIn PDF document text
    • http://restaurant.nomadsadventurequest.com/uploads/1/3/0/6/130639913/fezufijageriw.pdfIn PDF document text
    • https://zupudirepizogob.weebly.com/uploads/1/3/0/4/130488446/rufutirobikad.pdfIn PDF document text
    • http://chalkboardbullies.com/uploads/1/3/0/5/130551230/73bfde.pdfIn PDF document text
    • http://aaron.ag/uploads/1/3/0/6/130603835/gegixefeg.pdfIn PDF document text
    • http://londonambulanceservice-patientsforum.org/uploads/1/3/0/5/130541745/3896558.pdfIn PDF document text
    • http://pomef.bananatale.com/uploads/2020/01/27/6861435.pdfIn PDF document text
    • http://muzemawo.vmisku.ru/uploads/2020/01/27/f548eb.pdfIn PDF document text
    • http://thebiotutor.com/uploads/1/3/0/4/130488105/zabekoditan-levemo-repavivu-fijesiseb.pdfIn PDF document text
    • http://buildingonbookspodcast.com/uploads/1/3/0/4/130476555/pifuk.pdfIn PDF document text
    • http://rux.agm01.icu/uploads/2020/01/27/9839946.pdfIn PDF document text
    • http://bip.spec-techavto.ru/uploads/2020/01/27/4206638.pdfIn PDF document text
    • http://tularecountyedc.com/uploads/1/3/0/2/130288364/fefugupa_zilujomakaripa_xalajage.pdfIn PDF document text
    • http://smcfixitwithfive.weebly.com/uploads/1/3/0/6/130621294/130621294.html#cpg+guideline+atrial+fibrillationIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1448 7984 bytes
SHA-256: fdcdca0226d8729e55fb9a48c02d11761e34b6351c120ec44228bb23829935e8
font_01_sfnt_off00008674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8674 16280 bytes
SHA-256: 122edb8ff343abbb4a9e49943bbc84a5769d183f8d036cb79b7afb2313a63d54

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