PDF malware analysis — malicious · a084687948a2c971

MALICIOUS

PDF

47.5 KB Created: 2020-08-22 12:24:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a7bf69e8db881fb409d0e7943f4fce79 SHA-1: 7347fa462d3f3f48fa0ab6b3242504b2abe74d33 SHA-256: a084687948a2c971ca1362069dc9f90730b31ba6597be17b72970a57a6a163bd

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.com/pify?keyword=bibliography+format+for+books+mla. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise malicious activity within a seemingly legitimate document. The ML classifier also strongly indicated maliciousness.

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=bibliography+format+for+books+mla
- http://files.retailturnaroundexperts.com/uploads/1/3/1/4/131407965/goxutoxexona.pdf
- http://files.theflowersareburning.com/uploads/1/3/1/4/131438471/vapapo.pdf
- http://files.pinnaclelightinganddesign.com/uploads/1/3/1/8/131871518/givof_vozal_liromenudi_bugaremujafi.pdf
- https://cdn.shopify.com/s/files/1/0440/5490/4997/files/dr_collins_pcat_study_guide.pdf
- https://cdn.shopify.com/s/files/1/0436/3950/5054/files/nanubavapevuzemalimak.pdf
- https://cdn.shopify.com/s/files/1/0451/4326/1338/files/bollywood_2016_movies.pdf
- https://cdn.shopify.com/s/files/1/0434/2893/7884/files/resistance_band_exercises_for_abs.pdf
- https://cdn.shopify.com/s/files/1/0437/3030/5178/files/m_s_swaminathan_committee_report.pdf
- https://cdn.shopify.com/s/files/1/0434/5410/3713/files/vitil.pdf
- https://cdn.shopify.com/s/files/1/0428/2312/3100/files/82113528441.pdf
- https://cdn.shopify.com/s/files/1/0433/2843/8440/files/bajrang_dal_song_dj_shashi.pdf
- https://cdn.shopify.com/s/files/1/0434/4253/6604/files/geduged.pdf
- https://cdn.shopify.com/s/files/1/0431/1898/5370/files/boneloxepavuvujenosode.pdf
- https://cdn.shopify.com/s/files/1/0434/6085/3912/files/naxusaverakuginomogofepan.pdf
- https://cdn.shopify.com/s/files/1/0434/0134/7226/files/cello_quartet_sheet_music.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00007c52.bin` `d4e379fe2aefec31bf3435fe28602c174e42b7bb52c221fe70836951fbb9263f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C52	5672 bytes
`font_01_sfnt_off00008f81.bin` `a1fff2c2255fb33b28c3287c96538588800047e160e33abbe504ba42568706bf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F81	9908 bytes

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