Malicious PDF — malware analysis report

Static analysis result for SHA-256 48aa79f831f27a14…

MALICIOUS

PDF

41.9 KB Created: 2020-08-11 05:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 200da99b9c61c3a0a063ff073b2f7c8d SHA-1: 54c34406b71efaf8c327f31ccb8d387a4b56cdcd SHA-256: 48aa79f831f27a14bee68dbdb5b8e082e650df3d8d9e85eda0a83475e60f7a07
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'ttraff.cc' redirector. The document body, though heavily obfuscated, contains text related to market calculation and includes the malicious URL. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=total+addressable+market+calculation+pdf
    • http://files.chirho.consulting/uploads/1/3/2/8/132815003/solipovufebu.pdf
    • http://files.nsrec.com/uploads/1/3/0/9/130970009/tekitikikum.pdf
    • http://melizib.fatherhoodcommunitysolutions.org/uploads/1/3/1/4/131454165/0dc3a616381c25.pdf
    • http://files.greatalleghenypassagecompanion.com/uploads/1/3/1/8/131871740/lamuzozekejiged.pdf
    • https://cdn.shopify.com/s/files/1/0433/9374/5046/files/plug_in_baby_tab.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/kozifumivisirufu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lebalod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zotogobujadafozafinuv.pdf
    • https://cdn.shopify.com/s/files/1/0452/0479/9639/files/64965476183.pdf
    • https://cdn.shopify.com/s/files/1/0432/8947/7278/files/muwobomatexamuvumanekujek.pdf
    • https://cdn.shopify.com/s/files/1/0429/4914/8838/files/86185614853.pdf
    • https://cdn.shopify.com/s/files/1/0430/9234/4999/files/zepixetaturim.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/rotirapugafanunubonen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kijajakunij.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/65485087680.pdf
    • https://cdn.shopify.com/s/files/1/0429/4836/2399/files/mokuxipoguxatel.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.

FilenameKindSourceSize
font_00_sfnt_off00006582.bin
93cf62ec8b1185b6d590a3026ee4b3032d1161d8df810faa0dfb07dea8b3e31c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6582 5452 bytes
font_01_sfnt_off000077f6.bin
34fb541f78a5687952bb33e3f9319c7121a07153e12442af37ead33ad4c9c040
pdf-font-stream PDF embedded font (sfnt) at offset 0x77F6 10176 bytes