Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16a6b3693ae2bdc…

MALICIOUS

PDF

43.5 KB Authoring application: Scribus
MD5: 98375df6011d189a0bdd57989d2185c7 SHA-1: 6b6b3c766a2349bba7b298d151448a791a20180a SHA-256: a16a6b3693ae2bdc4ca559e46e0f9dac5ac3cd402f835093e4cdf41d8b132b53
150 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and a machine learning classifier gave a high confidence score. The primary heuristic indicates a 'PDF_SEO_LINK_FARM' with 21 external PDF links, the first being http://tammykjohnson.com/uploads/1/3/0/5/130590435/f542f5420f1bb.pdf. The document body contains a mix of unrelated text and a large number of URLs, reinforcing the link farm detection. The overall pattern suggests a phishing or SEO-based malicious distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://tammykjohnson.com/uploads/1/3/0/5/130590435/f542f5420f1bb.pdf
    • http://alecworley.weebly.com/uploads/1/3/0/5/130588702/mojozazapa_sotakarabirul_lozap_xorejaruba.pdf
    • https://kapemupesisupev.weebly.com/uploads/1/3/0/2/130271150/javifizinumawuf.pdf
    • http://neighbors4christ.org/uploads/1/3/0/2/130271195/1300327.pdf
    • http://fluger.icu/uploads/2020/01/28/2eb7a50b21db.pdf
    • http://liwa.soyana.ru/uploads/2020/01/29/175d88.pdf
    • http://asistersings.com/uploads/1/3/0/5/130589137/rimekozameto-fezeziloxezile-ziwivufuk.pdf
    • http://filmsoundpractice.com/uploads/2020/01/28/5604335.pdf
    • http://rpluscreativesmy.com/uploads/1/3/0/4/130478470/2592815.pdf
    • http://folufeji.spikedtearadio.com/uploads/2020/01/28/bixivoxufokazimut.pdf
    • http://cityglush25.icu/uploads/2020/01/28/fowogukir.pdf
    • http://angelajobin.com/uploads/1/3/0/6/130620574/tujudamipixofejogux.pdf
    • http://voluntourismargentina.com/uploads/1/3/0/4/130478205/napuz.pdf
    • http://danielreist.org/uploads/1/3/0/6/130621719/9615209.pdf
    • http://xiliwu.audiostart18.icu/uploads/2020/01/28/5207717.pdf
    • https://gabedesugilisop.weebly.com/uploads/1/3/0/5/130551140/0b127c383332.pdf
    • http://aaagospelminister.com/uploads/1/3/0/2/130291355/zudulamet.pdf
    • http://created2bsweet.com/uploads/1/3/0/4/130483397/zumekazazosuwek_novibu.pdf
    • http://fojuka.windows10update.ru/uploads/2020/01/28/e034f8685b4.pdf
    • http://atwi80d.com/uploads/1/3/0/4/130483909/6079493.pdf
    • http://solidinvestmentgroupbvba.com/uploads/1/3/0/3/130379377/kijukuxovofereje.pdf
    • http://absystemsllcscam.com/uploads/1/3/0/3/130379132/130379132.html#tummy+muscles+separated+during+pregnancy

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001682.bin
7a045c209d0b46fb69004bc3c16053b045069479ccef7b43c8f6110ee9fd7229		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1682 8540 bytes

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