Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d15c8f1213abb9…

MALICIOUS

PDF

66.5 KB Created: 2020-08-05 11:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b11dfdcae8c02d1686b3590dd979252 SHA-1: 80d07cbb79e26076714a65ada2bdc080881a5233 SHA-256: 07d15c8f1213abb95efdd55048c68d996efd029a473447e7ca1e85462a6da22f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that are part of a link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a lure for a 'calculus 10th edition solution manual pdf', which is likely a pretext to encourage users to click the malicious URL. No scripts were extracted, but the PDF structure and embedded links strongly indicate 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.ru/pify?keyword=calculus+10th+edition+solution+manual+pdf
    • http://files.evelyngamacounseling.com/uploads/1/3/2/6/132683000/5166439.pdf
    • http://files.thickandthintheatreproductions.com/uploads/1/3/0/9/130969300/suzaxipod.pdf
    • http://files.nicoledietze.com/uploads/1/3/0/7/130775557/9625904.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6903/1078/files/nagisusoxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9375/files/damopubalinumipi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65817182127.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7959/files/rexiwefusese.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/52083361867.pdf
    • https://cdn.shopify.com/s/files/1/0429/9623/6447/files/64647361000.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/47488330527.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/depome.pdf
    • https://cdn.shopify.com/s/files/1/0432/8875/6384/files/25690997281.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72163988246.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/firokepazasuguxomed.pdf
    • https://cdn.shopify.com/s/files/1/0433/8004/8023/files/wunukizererovejizoseporom.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009e9b.bin
59d8cdadf85cd8a86e6487f66a9925b210a56fd0ce165d7977e1b90e51a07393		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E9B 5400 bytes
font_01_sfnt_off0000b0c8.bin
64572888870b9d82432154edb418e41c8e881f1d92178375a4b46fdd5f84da48		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C8 2184 bytes
font_02_sfnt_off0000ba2a.bin
9b9963bc00283e3c061cc354bcb24ab0ee106c5eb38b9dd6879cfec35e82de13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2A 13952 bytes
font_03_sfnt_off0000e749.bin
5ef06bea0ce643391bea47400be2c481bde3ccceb1c2ec004e90928b1c9d5345		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE749 16140 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.