Malicious PDF — malware analysis report

Static analysis result for SHA-256 57c5b1552c4e375d…

MALICIOUS

PDF

57.7 KB Created: 2020-08-18 16:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db2242d4ff1e524dc8e4e179a8d3e329 SHA-1: 21f72e7f7082db57beef792e56384bc98991783c SHA-256: 57c5b1552c4e375d74e36a8207bc9c8aa41776440d63f55f1eb75d215a637b84
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains the text 'Reportaje de las carceles del ecuador' and the malicious URL, suggesting a lure to entice users to click the link. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, further supporting a malicious intent to distribute harmful content.

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=reportaje+de+las+carceles+del+ecuador
    • http://files.jnafhc.com/uploads/1/3/1/8/131871745/jofawelufatag-zubinepifaxa-xikaruwavaviga.pdf
    • http://mibonada.zoegreenband.com/uploads/1/3/2/6/132682883/4579851.pdf
    • http://files.boutiquefeisty.com/uploads/1/3/2/6/132683070/xowalujaj_lexibisopefaben.pdf
    • http://files.berwickpsychologyandhypnosis.com/uploads/1/3/0/7/130738673/lesoba_kukaruxobodi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/canon_powershot_s2_is.pdf
    • https://cdn.shopify.com/s/files/1/0435/5588/1121/files/wugirodetafefunu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tizisixurodegu.pdf
    • https://cdn.shopify.com/s/files/1/0440/9117/9160/files/lol_surprise_doll_coloring_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/61384251661.pdf
    • https://cdn.shopify.com/s/files/1/0431/0017/6544/files/bobsweep_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tikodizexosuva.pdf
    • https://cdn.shopify.com/s/files/1/0437/9561/1810/files/rebizixizolugol.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/nopene.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/fizagexafegopuzenujuzo.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_off0000a115.bin
fcc3d8f4b41368f508024105e8f0fc9c2bb64b44fd060a81769d7cf8fbdfbb7d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA115 5152 bytes
font_01_sfnt_off0000b2b1.bin
74af32d7ab65a2a6d450ef665dee9423182781125ba1b78b08ea7fd341adb92c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B1 11528 bytes