Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4a2302ab0b14b5…

MALICIOUS

PDF

48.8 KB Created: 2020-08-01 22:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14fd1c899717f2b02cbe6460c153d183 SHA-1: bbfd64d1a03f0d67670c758818471abe8f32ca78 SHA-256: 9d4a2302ab0b14b52f050d0e543c343408992bc9637b20b593c39ea9f428b815
152 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 content, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary malicious URL is https://ttraff.com/pify?keyword=everyday+writer+5th+edition.+pdf. The document body and embedded links suggest a lure related to a document titled 'Everyday writer 5th edition.pdf', aiming to trick users into clicking the malicious link.

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.com/pify?keyword=everyday+writer+5th+edition.+pdf
    • http://files.epiphanyhairsalon.net/uploads/1/3/2/8/132814900/xugixod.pdf
    • http://files.bookcellarlwonline.com/uploads/1/3/1/8/131860787/xejapami.pdf
    • http://files.nicolaforemanquilts.com/uploads/1/3/0/7/130776083/1dde0.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/18241311399.pdf
    • https://cdn.shopify.com/s/files/1/0434/5580/7640/files/87186619149.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/leave_and_earnings_statement.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwakuda.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zisavugeti.pdf
    • https://cdn.shopify.com/s/files/1/0436/1263/5299/files/raspberry_pi_ssd.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/majiwixopasefetepavaga.pdf
    • https://cdn.shopify.com/s/files/1/0428/8266/2553/files/vezobulinaregatofanozel.pdf
    • https://cdn.shopify.com/s/files/1/0432/6545/8336/files/xegokabejojid.pdf
    • https://cdn.shopify.com/s/files/1/0435/1806/6843/files/dibofikisisegisijuvi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9138/files/nefaxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/5993/files/zivolafadu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1848/4888/files/739444036.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/suxajevazomokif.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_off000071f6.bin
d2237b1a2be77de61295db10bf7fadf5955d1374e49c18f9bc03c30a9b05bd06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F6 5072 bytes
font_01_sfnt_off00008357.bin
bbcbfac7d8dc8cbe9109c4bd55a7f91e7d1dd411d6794f6450347f33681db769		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8357 10760 bytes
font_02_sfnt_off0000a7db.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7DB 4324 bytes

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